Section 129
SEC. 129. Where it has been agreed that an insurance upon a particular thing, or a class of things, shall be free from particular average, a marine insurer is not liable for any particular average loss not depriving the insured of the possession, at the port destination, of the whole of such thing, or class of things, even though it become entirely worthless; but he is liable for his proportion of all general average loss assessed upon the thing insured.