However, any health club that certifies in writing with the director that it will sell and maintain health club contracts for no more than 24 months and with no more than the number of persons indicated below shall, for so long as it abides by this certification, be required to file with the director such financial security only in the amounts indicated below:
300 persons--$50,000 bond or letter of credit
150 persons--$25,000 bond or letter of credit
73 P.S. § 2171