Subject to subsection (3) below, every accretion from the sea, whether natural or artificial, and any part of the sea-shore to the low water-mark, which does not immediately before the passing of this Act form part of a parish shall be annexed to and incorporated with—
(a) in England, the parish or parishes which the accretion or part of the sea-shore adjoins, and
(b) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
in proportion to the extent of the common boundary.
Every accretion from the sea or part of the sea-shore which is annexed to and incorporated with a parish . . . under this section shall be annexed to and incorporated with the district and county in which that parish . . . is situated.
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In England, in so far as the whole or part of any such accretion from the sea or part of the sea-shore as is mentioned in subsection (1) above does not adjoin a parish, it shall be annexed to and incorporated with the district which it adjoins or, if it adjoins more than one district, with those districts in proportion to the extent of the common boundary; and every such accretion or part of the sea-shore which is annexed to and incorporated with a district under this section shall be annexed to and incorporated with the county in which that district is situated.