The Village Board of Trustees shall provide for the manner in which such regulations, restrictions and the boundaries of such districts, including any amendments thereto, shall be determined, established and enforced. However, no such regulations, restrictions or boundaries shall become effective until after a public hearing in relation thereto, at which the public shall have an opportunity to be heard. At least 10 days' notice of the time and place of such hearing shall be published in a paper of general circulation in the Village.