Sentence:  And incaſe his Majeſtie or his Commiſſioner be not preſent for the time in the town where the Aſsembly is holden, it ſhall be leaſome to the ſaid generall Aſsembly by themſelves to appoint the time and place of the next. But this declaration not only leaves all indefinit, but totally <WSD>everts</WSD> that power and liberty competent to them by law and cuſtome. 
Meaning of the word marked with <WSD> tags:  To disrupt; to overthrow.