Singapore legislation
Regulation 4
Regulation 4
Particulars of numerals or lettering to be used
The numerals or lettering used shall be —
(a)
of such colour as to contrast with the background against which they are marked or displayed;
(b)
of sufficient size as to render them clearly discernible from a distance of 10 metres; and
(c)
of durable, non-absorbent material, which expression shall be deemed to include paint.