1 rule
no reduced rate of contributions to a guaranteed employment account is permitted to a person (or a group of persons) having individuals in his (or their) employ unless—
(A) the guaranty of remuneration was fulfilled in the year preceding the computation date; and
(B) the balance of such account amounts to not less than 2½ percent of that part of the payroll or payrolls for the 3 years preceding the computation date by which contributions to such account were measured; and
(C) such contributions were payable to such account with respect to 3 years preceding the computation date;