(1) A tree bond agreement must—
(a) be in writing; and
(b) be signed by both parties to the agreement; and
(c) state the amount of tree bond for the agreement.
(2) A tree bond agreement has effect—
(a) on the date it is signed; and
(b) for the period decided by the decision-maker and stated in the agreement, unless ended earlier in accordance with section 95.
(3) For subsection (2) (b), the end of the period must not be more than 3 years after the day any activity carried out under an authorisation mentioned in section 92 (1) (a) is completed.
(4) A tree bond agreement may be amended in writing by the parties, including by extending the period of the agreement.
(5) A regulation may prescribe—
(a) the amount of a tree bond; and
(b) matters the decision-maker must or may take into account when deciding—
(i) a tree bond amount; or
(ii) the period for which a tree bond has effect.