29. The amendments made by these Regulations do not apply in any case where before the date these Regulations come into force in relation to an energy excepted building—
(a)a building notice, an initial notice, a plans certificate or a public body’s notice is given to, or full plans deposited with, a local authority; or
(b)building work is being or has been carried out in accordance with any such notice or plans whether with or without any departure from such notice or plans.