199. This Act entails a change pleno jure, within the limits of its provisions, in the obligations of an insurer under a contract of insurance in force.
Such change shall not justify any increase of the amount of the premium fixed by the contract, nor its cancellation.
If the obligations of an insurer under a contract in force are reduced, the premium provided for with regard to such contract must be adjusted accordingly.
If the premium has been paid in advance, the amount of adjustment must be remitted within three months unless the insured accepts during that period to be credited with the amount.