‘The word “or” in statutes has caused many difficulties of construction, difficulties which could have been avoided had greater care been taken with the drafting. The word “or” can be used in a conjunctive sense but when it is, greater clarity can be obtained by the use of other words. For example, had the draftsman intended “or” in section 1(1) [of the Oil inNavigable Waters Act 1955 , referring to “ owner or master ”] to be construed conjunctively he could have achieved the same result by the use of the phrase “the owner and master or either of them.” The ordinary and natural meaning of “or” is disjunctive: see In re Diplock[1941] Ch 253 , in which Sir Wilfred Greene MR said, at p. 260: “The word ‘or’ is prima facie, and in the absence of some restraining context, to be read as disjunctive. …”’
‘It is and was always open to the Parties to seek to join the Public Authority and at no time has this been done.’