I believe that statement about some exceptions refers to the words preceding it meaning there may be exceptions in accepting the service---but not the dates. To give an example...I had an ancestor who DID serve during the Revolution but was fined for failing to show up for duty after the time he served. At one time his service was accepted and people joined based upon that service but when DAR tightened up their requirements I would have had to have proved he served faithfully again after the date he was fined...which I was unable to do. I have never in all the years I served my chapter as Registrar seen them accept an application for service outside the dates of the Revolution period.
Joan