Each local registrar shall be paid the sum of One Dollar ($1.00) for each birth and each death certificate properly made out, and in the manner and on the form required by the State Board of Health. Such sum shall be paid by the board of supervisors of the county in which the births and deaths occurred, upon certification made monthly to the board of supervisors by the state registrar. However, any local registrar shall receive only Fifty Cents (50¢) for each birth and each death certificate sent in to the Bureau of Vital Statistics improperly completed or sent in at a later time than that fixed by the regulations of the State Board of Health.