(a) It shall be competent, in all charters framed under the authority given by Section 5 of Article XI, to provide, in addition to those provisions allowable by this Constitution, and by the laws of the State for the manner in which, the times at which, and the terms for which the members of boards of education shall be elected or appointed, for their qualifications, compensation and removal, and for the number which shall constitute any one of such boards.(b) Notwithstanding Section 3 of Article XI, when the boundaries of a school district or community college district extend beyond the limits of a city whose charter provides for any or all of the foregoing with respect to the members of its board of education, no charter amendment effecting a change in the manner in which, the times at which, or the terms for which the members of the board of education shall be elected or appointed, for their qualifications, compensation, or removal, or for the number which shall constitute such board, shall be adopted unless it is submitted to and approved by a majority of all the qualified electors of the school district or community college district voting on the question. Any such amendment, and any portion of a proposed charter or a revised charter which would establish or change any of the foregoing provisions respecting a board of education, shall be submitted to the electors of the school district or community college district as one or more separate questions. The failure of any such separate question to be approved shall have the result of continuing in effect the applicable existing law with respect to that board of education.