3Section 6(1) of the [1939 c. 107.] Patents, Designs, Copyright and Trade Marks (Emergency) Act 1939 shall continue to have effect with the amendment made by section 6(2) of the [1946 c. 44.] Patents and Designs Act 1946, that is, with the substitution of " that the act was not done within the time so limited by reason that a person was on active service or by reason of " for " that the doing of the act within the time so limited was prevented by a person's being on active service or by ".