(a) the installment that is first could be no more than 30 days and fifteen days following the date regarding the loan.
The licensee may charge and collect an extension charge not exceeding 1/30 of the portion of the finance charge applicable to a first installment period of one month for each day that the first installment date is deferred beyond one month if such date is more than one month after the date of the loan. Such extension cost can be collected at the time of re payment for the installment that is first at any time thereafter. The licensee shall, on the date of the loan, credit against the finance charge an amount not less than 1/30 of the portion of the finance charge applicable to a first installment period of one month for each day the first installment date is less than one month if the first installment date is less than one month after the date of the loan.