S.L. 10.31 ст. 3Dimensions of stone used in building.

No person may use in the building of any wall any franka stone the dimensions of which, or any of the dimensions of which, exceed the following:

(a) 50.80cm (20 inches) in length, 26.03cm (10¼ inches) in height and 15.24cm (6 inches) in thickness in the case of stone used in Malta; and

(b) 50.80cm (20 inches) in length, 27.94cm (11 inches) in height and 15.24cm (6 inches) in thickness in the case of stone used in Gozo or Comino.