The Board shall, subject to any other arrangements notified by them to the earner specified in regulation 105, give notice to the earner of the special Class 4 contribution due from him for any year, and the earner shall pay that contribution to the Board within the period of 28 days from the receipt of the notice unless, before the expiry of that period, the earner has appealed against a decision made under section 8 of the Transfer Act relating to that contribution.