3. Subject to the provisions of these Regulations, for the purposes of section 5 of, and Schedule 1 to, the 2002 Act, a crossing operator may cause or permit the placement on or near a private road or path of a crossing sign of a size, colour and type described and shown —
(a)in a diagram in Schedule 1; or
(b)in a diagram in Schedule 3 to the 1997 Regulations;or
(c)in one of the diagrams numbered 601.1, 602, 1001, 1002.1, 1003, 1003.2, 1004, 1004.1, 1005.1, 1005, 1008, 1008.1, 1010, 1012.1, 1013.1, 1014, 1022, 1023, 1026, 1045, in Schedules 2 and 6 to the 1997 Regulations.