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(a) With reference to insurances against loss or damage to property, except as provided in section 505 of this title and with reference to all general casualty insurances, disability insurance except as provided in section 506 of this title and surety insurance, every insurer shall maintain an unearned premium reserve on all policies in force.
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(b) The Commissioner may require that such reserve shall be equal to the unearned portions of the gross premiums in force after deducting authorized reinsurance, as computed on each respective risk from the policy’s date of issue. If the Commissioner does not so require, the portions of the gross premiums in force, less authorized reinsurance, to be held as a premium reserve, shall be computed according to the following table:
| Term for which policy was written | Reserve for unearned premium | |
| One year, or less | ½ | |
| Two years | First year | ¾ |
| Second year | ¼ | |
| Three years | First year | ⅚ |
| Second year | ½ | |
| Third year | ⅙ | |
| Four years | First year | ⅞ |
| Second year | ⅝ | |
| Third year | ⅜ | |
| Fourth year | ⅛ | |
| Five years | First year | 9⁄10 |
| Second year | 7⁄10 | |
| Third year | ½ | |
| Fourth year | 3⁄10 | |
| Fifth year | 1⁄10 | |
| Over five years | Pro rata |
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(c) In lieu of computation according to such table, all of such reserves may be computed, at the insurer’s option, on a monthly pro rata basis.
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(d) After adopting any one of the methods for computing such reserve an insurer shall not change methods without the Commission’s approval.