These regulations or any portion thereof may be amended, supplemented, or repealed at any time by the Town Board on its own motion or by petition or by recommendation of the Planning Board. All proposed amendments shall be referred to the Planning Board for study and recommendation, and the Planning Board, prior to taking action on any proposed amendment, shall hold a public hearing thereon, which hearing has been duly advertised at least 10 days prior to such public hearing in a newspaper of general circulation in the Town.