(1)  If the results of a test of a meter indicate a margin of error not exceeding 5% –

(a) the person who requested the test is to pay the costs incurred in testing the meter; and

(b) the account of the person is not to be adjusted.

(2)  If the results of a test of a meter indicate a margin of error exceeding 5% –

(a) the person who requested the test is not required to pay the costs incurred in testing the meter; and

(b) the account of the person is to be adjusted proportionately to the ratio of the margin of error.