84.Subsection (1) defines the point at which modifications to an SSSI notification, or alterations made to an SSSI notification by virtue of sections 5 to 9, take effect. Original SSSI notifications have effect from the date on which they are given (see sections 3(6) and 48(2)) and they have effect in their modified or amended form as of the date on which notice of the relevant change is given.
85.Subsection (2) provides that, where SNH gives notice (under paragraph 10 of Schedule 1) that it has withdrawn a notification of enlargement (given under section 5(1)), the original SSSI notification continues to have effect in its unaltered, original form. In other words, the notification reverts to the status quo ante and the situation continues as if the proposal for enlargement had never been made. It should be noted that this does not invalidate the effects which any notification given under section 5(1) may have had during the period between notification and withdrawal – for example where a decision by a regulatory body or under the planning system may have been influenced by the notice of enlargement.
86.Subsection (3) provides that an SSSI notification ceases to have effect when SNH gives notice (under paragraph 10 of Schedule 1) of its decision to withdraw the SSSI notification. It also provides that a denotification of a whole SSSI does not, in contrast to a partial denotification, have effect until the relevant notification under section 9(1) is confirmed. A default arrangement covering the situation in which SNH fails to take a decision is covered separately in paragraph 5 of Schedule 1.