What does the law say about posting labor law notices?
There is no one statute to cover the posting of labor law notices in general. Basically the Federal Department of Labor and State equivalents have their own statutes which require notices to be posted in the workplace. For example, Title 29, Chapter 22, Section 2003 of US Code requires the posting of the Employee Polygraph Protection notice. 29CFR825.300 requires the Federal FMLA and the 29CFR1903.2(a)(1) requires the OSHA posting to be posted.