insert
(3) This section does not apply in relation to a tower crane or a gantry crane if—
(a) the crane is relocated for use in a different workplace; and
(b) the design of the supporting structure or foundations of the crane is altered in accordance with a site-specific design prepared for the purpose of the safe operation of the crane at the new location; and
(c) the design of the crane is not altered in any other way.