16.3. The financial institution that administers a simplified pension plan shall keep for each employer party to the plan a register in which shall be entered:
(1) the date on which the employer joined the plan and that on which he withdrew from the plan;
(2) a list of the amendments made to the portion of the plan that contains the provisions specific to the employer;
(3) a copy of the notices sent pursuant to the third paragraph of section 11.1.