The subdivider shall be in default of this performance surety when one of the following conditions exist:
(a) The installation of all required public improvements as called for in these Regulations has not taken within the two (2) year time period agreed upon in the subdivider’s contract with the Village, and the subdivider has failed to establish reasonable cause for such delay to the satisfaction of the Planning Commission and thereby to receive a time extension.
(b) The subdivider has not constructed the required public improvements in accordance with the minimum standards specified in these Regulations, and the subdivider is unwilling to modify and to upgrade said public improvements within a six (6) month time period so as to be in compliance with the provisions of these Regulations.