(1)An obligation under a conservation covenant has effect for the default period, unless the covenant provides for a shorter period.
(2)The default period for the purposes of subsection (1) is—
(a)if the qualifying estate in relation to the obligation is an estate in fee simple absolute in possession, a period of indefinite duration, and
(b)if the qualifying estate in relation to the obligation is a term of years absolute, a period corresponding in length to the remainder of the period for which the term of years was granted.