16In section 63(1) of the Act of 1949 (interpretation)—
(a)for the definition of " land " there shall be substituted the following definition—
“' land ' has the same meaning as, by virtue of Schedule 1 and paragraph 4 of Schedule 2 to the [1978 c. 30.] Interpretation Act 1978, it has in an Act passed on or after 1st January 1979 ;”
(b)in the definition of " local authority " at the end there shall be inserted the words " and, in relation to Northern Ireland, a district council established under the [1972 c. 9 (N.I.).] Local Government Act (Northern Ireland) 1972 ";
(c)before the definition of " owner " there shall be inserted the following definitions—
“' modifications ' includes additions, omissions and amendments, and ' modify' shall be construed accordingly ;
' operator', in relation to an aircraft, has the same meaning as in the [1971 c. 75.] Civil Aviation Act 1971 ;”and
(d)the definition of "purposes of civil aviation" shall be omitted.