21.—(1) Every claim for compensation under these Regulations and every request for a review of an award of long term compensation shall be made in accordance with the provisions of this Regulation.
(2) Every such claim and request shall be made to the Agency in such form and in such manner as the Agency may determine.
(3) On receipt of any such claim or request the Agency shall consider the same in accordance with the relevant provisions of these Regulations, and shall within the time prescribed therein notify the claimant in writing of their decision in respect thereto.
(4) Every notification of a decision by the Agency (whether granting or refusing compensation or an award of compensation or a review of an award, or otherwise affecting any compensation under these Regulations) shall contain a statement directing the attention of the claimant to his right, if he is aggrieved by the decision, to refer the matter to a tribunal, and furnishing particulars of the address of the appropriate tribunal.