M-B has pretty plain language so yes, in my opinion it would apply to all Air Carriers regardless of size. The mechanism for integration is Allegany -Mohawk not DOH. I don't think a 135 company is required to have a seniority list but they would probably end up with one in the event of an integration. The only way around this is to call your Senator and get the law changed or challenge it in court. If you don't think M-B should protect 135 pilots, what should replace it? Don't forget there would also be unintended consequences if the law got changed.