diff --git a/dumux/freeflow/navierstokes/mass/1pnc/CMakeLists.txt b/dumux/freeflow/navierstokes/mass/1pnc/CMakeLists.txt
index 80a354512118fde85db2d6a7a66cd553b4c2d7e7..78b34312e6d5a46ce7780032d91c393fb5dcdef0 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/CMakeLists.txt
+++ b/dumux/freeflow/navierstokes/mass/1pnc/CMakeLists.txt
@@ -1,3 +1,6 @@
+# SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+# SPDX-License-Identifier: GPL-3.0-or-later
+
file(GLOB DUMUX_FREEFLOW_NAVIERSTOKES_MASS_1PNC_HEADERS *.hh *.inc)
install(FILES ${DUMUX_FREEFLOW_NAVIERSTOKES_MASS_1PNC_HEADERS}
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/dumux/freeflow/navierstokes/mass/1pnc)
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/advectiveflux.hh b/dumux/freeflow/navierstokes/mass/1pnc/advectiveflux.hh
index 46c490d453dc041c48df31c522d4092be76ca1c2..bf0ad44fd6981733e02d2048fcc89cf631afcbca 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/advectiveflux.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/advectiveflux.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup NavierStokesModel
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/fluxvariables.hh b/dumux/freeflow/navierstokes/mass/1pnc/fluxvariables.hh
index b81686553b77c4d3e43439156a67baeedc2c13e4..9549ec1e1ea15c811240aecfd23d36332de4dea0 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/fluxvariables.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/fluxvariables.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup NavierStokesModel
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/indices.hh b/dumux/freeflow/navierstokes/mass/1pnc/indices.hh
index b059cd68608d2b89f1f42f304ba391031f4d2f16..8e0885dedccad4bc466a8eb6eec6cc3ef089d864 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/indices.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/indices.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup NavierStokesModel
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/iofields.hh b/dumux/freeflow/navierstokes/mass/1pnc/iofields.hh
index 6e89bf69123c35a2e6ac1bc3f823e63fbbbbff9b..560b73c3eed6aa8f64b509d816a248325478a7e9 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/iofields.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/iofields.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup FreeflowNCModel
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/localresidual.hh b/dumux/freeflow/navierstokes/mass/1pnc/localresidual.hh
index 1cfd8a4803b5a04663d6652ddcc83e9c4cbb415f..3b95c494ed8ad5b42296c2c861689c4c998c1a9d 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/localresidual.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/localresidual.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup NavierStokesModel
diff --git a/dumux/freeflow/navierstokes/mass/1pnc/volumevariables.hh b/dumux/freeflow/navierstokes/mass/1pnc/volumevariables.hh
index 9626e980e2554434e615fbeda7525b0769e17c29..9195dd605415430cd28c996a1aead80ce9309c09 100644
--- a/dumux/freeflow/navierstokes/mass/1pnc/volumevariables.hh
+++ b/dumux/freeflow/navierstokes/mass/1pnc/volumevariables.hh
@@ -1,21 +1,9 @@
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
-/*****************************************************************************
- * See the file COPYING for full copying permissions. *
- * *
- * This program is free software: you can redistribute it and/or modify *
- * it under the terms of the GNU General Public License as published by *
- * the Free Software Foundation, either version 3 of the License, or *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program. If not, see <http://www.gnu.org/licenses/>. *
- *****************************************************************************/
+//
+// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
/*!
* \file
* \ingroup NavierStokesModel