(a) A judicial proceeding for breach of any obligation arising under section 4-113 or 4-114 must be commenced within six years after the cause of action accrues, but the parties may agree to reduce the period of limitation to not less than two years. With respect to a unit that may be occupied for residential use, an agreement to reduce the period of limitation must be evidenced by a separate instrument executed by the purchaser.
(b) Subject to subsection (c), a cause of action for breach of warranty of quality, regardless of the purchaser's lack of knowledge of the breach, accrues:
(1) As to a unit, at the time the purchaser to whom the warranty is first made enters into possession if a possessory interest was conveyed or at the time of acceptance of the instrument of conveyance if a nonpossessory interest was conveyed; and
(2) As to each common element, at the time the common element is completed or, if later, as to: (i) A common element that may be added to the common interest community or portion thereof, at the time the first unit therein is conveyed to a bona fide purchaser: or (ii) a common element within any other portion of the common interest community, at the time the first unit is conveyed to a bona fide purchaser.
(c) If a warranty of quality explicity extends to future performance or duration of any improvement or component of the common interest community, the cause of action accrues at the time the breach is discovered or at the end of the period for which the warranty explicitly extends, whichever is earlier.