Extension. The applicant(s) may request an extension of the planned unit development for a period not to exceed twelve months upon a showing of good cause. The applicant(s) shall apply to the town in writing for the extension no later than ninety days prior to expiration. The applicant(s) shall provide such information as is necessary for the town to determine whether good cause exists for the extension. Such information may include, but is not limited to, good faith efforts to obtain required authorization from other agencies with jurisdiction, such as the Department of Environmental Quality, delay in construction due to weather conditions, or other causes which have delayed the project and which are beyond the reasonable control of the applicant(s). The board shall promptly consider the request for the extension and either allow it or deny it. No PUD shall expire during the time the decision on the extension is being considered.