The failure of a public entity to provide a notice pursuant to subdivision (c) of Section 2600 shall not excuse either of the following:
(a) The public entity from the requirement to obtain an enforceable commitment that a bidder, contractor, or other entity will use a skilled and trained workforce to complete a contract or project.
(b) A bidder, contractor, or other entity from the obligation to use a skilled or trained workforce if such a requirement is imposed by a statute or regulation.