Mr. Barry O'Brien:

In general terms, what applies in respect of the travel allowance is clear as it was originally based on car horsepower. In the case of the other allowance, there may be a slight variable and a cut-off point is arbitrarily set such that if one was earning more than one got for that subsistence and if one was earning below that, one got that amount. The same qualifying criteria applied, namely, that if one is away from one's nominated base for more than five or ten hours or overnight, that is the reason one would qualify.