Article 4
For the purposes of article 3 above—
(a)
a bed shall be taken to be of the same description as another bed if that other bed is by reason of its construction of a description with which the bed may reasonably be compared; and
(b)
a person shall at any time be taken to propose a particular price only if before that time he has given notice by display, advertisement or other public notice of his intention to do business at that price at or after a date specified therein or after a period so specified.