(a) Any local or regional board of education may authorize the administration of schools under its direction to impose an in-school suspension on any pupil whose conduct endangers persons or property or is seriously disruptive of the educational process, or is violative of a publicized policy of such board. No pupil shall be placed in in-school suspension without an informal hearing before the building principal or such principal's designee at which such pupil shall be informed of the reasons for the disciplinary action and given an opportunity to explain the situation, provided no pupil shall be placed in in-school suspension more than fifteen times or a total of fifty days in one school year, whichever results in fewer days of exclusion.
(b) A local or regional board of education may reassign a pupil to a regular classroom program in a different school in the school district and such reassignment shall not constitute a suspension pursuant to section 10-233c , or an expulsion pursuant to section 10-233d .