3.—(1) The principal Regulations shall continue to apply to—
(a)plans deposited or a building notice given in accordance with the principal Regulations before the commencement of these Regulations;
(b)building work carried out in accordance with such plans or such building notice with or without any departure or deviation from those plans or that building notice; and
(c)building work completed before the commencement of these Regulations,
as if the amendments effected by these Regulations had not been made.
(2) The amendments made by regulations 5, 7, 8 and 9 shall not apply to—
(a)plans deposited or a building notice given in accordance with the principal Regulations before 1st January 2017;
(b)building work carried out in accordance with such plans or such building notice with or without any departure or deviation from those plans or that building notice; and
(c)building work completed before 1st January 2017.
(3) In paragraphs (1) and (2)—
“building notice” means a notice given under regulation 9 (Giving of notices and deposit of plans) of the principal Regulations; and
“building work” has the same meaning as in the principal Regulations.