No provision of R.S. 30:179.11 to 30:179.14 shall be construed to impair any obligation of any agreement made and entered into within the authority and pursuant to the provisions either of Act 38 of 1956 or 352 of 1958, or Act 9 of 1962, and any such agreement made pursuant to and within the authority of any of said Acts is hereby ratified, validated and confirmed.
La. R.S. § 30:179.14