The seller may or may not comply.

Shaun Alexander I would pluck out those trades from his contract to an addendum, you obviously don’t know contracts, talk to your license board and see what your options are on suing if he doesn’t comply.

Three neighbors told me the offending neighbor would never comply and one even said, "but he's a good neighbor".

Real Estate Blog and Website to Comply by May 25.I just published an article here in Bigger Pockets Blogs explaining this new law. 

I know they obviously complied.

But just because the lease states it, doesn't mean the tenant will still comply.

According to the lease, I can evict is the tenant does not comply to the terms of the lease.

A pre-ordinance (built before July 8, 1957) residential building or building of mixed residential occupancy, not complying with the requirements in force and applicable to the building at the time of its conversion, may be altered so as to legalize one dwelling unit, in addition to the number of dwelling units originally authorized, providing that said unit was determined by the office of the zoning administrator or the zoning board of appeals to have existed prior to July 8, 1957, and provided such building complies with the other provisions of this chapter.

Real estate activity; unlicensed personA.(1) In addition to any other civil remedy or civil penalty provided for in this Chapter, the commission may issue a subpoena to any person or persons who the commission has probable cause to believe has engaged in real estate activity without a currently valid license.(2) Subpoenas issued by the commission shall comply with the notice requirements of R.S. 49:955.

Furthermore, you are right- without an architect on board you have no idea what all the work will cost nor what or how it should comply.