means -
(a) in relation to a mortgage credit asset or substitution asset held or proposed to be held by a designated mortgage credit institution - the prudent market value as determined in accordance with section 41,
(ab) in relation to a commercial mortgage credit asset or substitution asset held or proposed to be held by a designated commercial mortgage credit institution - the prudent market value as determined in accordance with section 41 as applied and modified by section 41B, and
(b) in relation to a public credit asset or substitution asset held or proposed to be held by a designated public credit institution - the prudent market value as determined in accordance with section 56