Welcome Paulie...
You will likely need to hire a lumber grading/inspection agency that can provide certification in accordance with
DOC PS 20. This is required by the Louisiana Residential Code Sect. R602.1.1 (below).
A brief google search and I found
Timber Products Inspection (website linked).
LA Res. Code (2021 IRC) R602.1.1 Sawn Lumber
Sawn lumber shall be identified by a grade mark of an accredited lumber grading or inspection agency and have design values certified by an accreditation body that complies with DOC PS 20. In lieu of a grade mark, a certification of inspection issued by a lumber grading or inspection agency meeting the requirements of this section shall be accepted.