Versions of Louisiana Civil Code 1372 - Observance of formalities. on LawServer 2023 Louisiana Civil Code 1372 – Observance of formalities. 2022 Louisiana Civil Code 1372 – Observance of formalities. 2021 Louisiana Civil Code 1372 – Observance of formalities. 2020 Louisiana Civil Code 1372 – Observance of formalities. 2019 Louisiana Civil Code 1372 – Observance of formalities.