xmlns:atom="http://www.w3.org/2005/Atom"
6. No alteration such as is described in regulation 4 other than—
(a)an alteration in pursuance of a proposal disputing the accuracy of a previous alteration,
(b)an alteration to enter a completion day determined under Schedule 4A to the Act, or
(c)an alteration required by order of a tribunal under Part V of these Regulations,
shall have effect from a day earlier than the first day in the year in which the alteration is made.