7. Section 6 of the principal enactment is hereby amended

Amendment of as follows :-—

section 6 of the principal

by the substitution, in paragraph (a) of that section, enaeimen for the words “irrigation systems”, of the words

by the substitution, in paragraph (b) of that section, for the words “irrigation systems”, of the words

by the substitution, in paragraph (c) of that section, for the words “irrigation system”, of the words

by the substitution, in paragraph (d) of that section, for the words “irrigation systems”, of the words

by the substitution, in paragraph (g) of that section, for the words “irrigation systems”, of the words

by the substitution, in paragraph (A) of that section, for the words “irrigation systems”, of the words