Thad Allen was supposed to have directed his staff to develop Standard Operating Procedures (SOPs) for such an event including "a process to instantly waive The Jones Act" in the event of a large spill.
Except, there's one problem. It's one of those selective reading things. No waiver was needed because he issued a ruling, prior to June 15, that the Jones act didn't apply. At all. There's nothing to waive. That's why no vessels were ever turned away, at all, as a result of the Jones act.
However, he did put in place a process that said that if any waivers were ever requested, that they should be granted.
Yes, half-truths have been repeated on a variety of editorial pages, but try googling "Jones Act" on google news. There's plenty of sources to set the record straight.
The issue of environmental regulations is slightly more difficult. It does appear that the oil free discharge requirement was not waived for some time, although if you could find a credible source describing the environmental impact of that decision, I would love to read it. I have seen Thad Allen talking about how those vessels, recently imported to the gulf, aren't performing all that well, because they were designed for highly concentrated surface spills, such as from a tanker.
ETA: Here's a section of Wikipedia about the Jones act-
wikipedia said:
Section 27, also known as the Jones Act, deals with cabotage (i.e., coastal shipping) and requires that all goods transported by water between U.S. ports be carried in U.S.-flag ships, constructed in the United States, owned by U.S. citizens, and crewed by U.S. citizens and U.S. permanent residents.
Skimmers aren't transporting any goods between US ports.
It's always possible that some people at BP in the early days of the spill didn't understand the law and turned away vessels based on that misunderstanding, and that misunderstanding was passed along to the media, or it's possible that it's all a right wing fantasy.