(a) Industrial fire insurance policies are policies issued by insurers writing fire and allied lines of insurance through agents operating on the debit agency system under which system a weekly or monthly collection percentage is paid based either on actual weekly or monthly premium collections or weekly or monthly increases of premium collections.
(b) No such policy, or such policies, covering any of the same subjects of insurance shall be issued which provides indemnity exceeding the limits set by the commissioner as to any one loss resulting from any, or all, of the hazards or perils insured against.
(c) No such policy shall be issued except upon a monthly or weekly premium payment basis. No discount for premiums paid in advance shall exceed five percent for premiums paid for six months in advance or 10 percent for premiums paid for 12 months in advance. In no event shall premiums be collected for more than 12 months in advance.