324. Seashore or foreshore.

The boundary line between the seashore1 and the adjoining land is, in the absence of usage or evidence to the contrary2, the line of the median high tide between the ordinary spring and neap tides3.

The boundary of land abutting upon the seashore may vary from time to time, and in the case of a conveyance of land described as bounded by the seashore, then, as the medium high and low water marks shift, so does the boundary of the land shift also; for there may be a movable freehold