Three Missouri lawmakers have resigned before a new constitutional amendment takes effect forcing lawmakers to wait longer to become lobbyists.

Democratic Sen. Jake Hummel said in a statement Tuesday that he left office early because he wanted to preserve his ability to register as a lobbyist.

Under current law, he must wait six months after his term before lobbying. A constitutional amendment taking effect Thursday requires a two-year wait, but it only applies to those serving on or after that date.

Republican House members Kirk Mathews and Kevin Corlew also have submitted resignations. Mathews' was effective Nov. 27. Corlew's will take effect Wednesday. Neither listed a reason in their resignation letters.

All three lawmakers were scheduled to end their terms in January.

Kurt Parsons