Whenever a vacancy shall occur in any town office or in the employment of the town, or, when by reason of a retirement, resignation, expiration of a fixed term, or otherwise, a vacancy can be anticipated, the town manager or other appointing authority shall forthwith cause public notice of such vacancy or impending vacancy to be publicly posted on the town bulletin board and website for not less than 10 days. Each such notice shall contain a brief description of the duties of the office or position and shall indicate a list of necessary or desirable qualifications for the office or position. Any person who desires to be considered for an appointment to fill such vacancy may, within 10 days following the date the notice is posted, or such longer period as may be indicated in such announcement, file with the appointing authority a statement setting forth with reasonable clarity and specificity, the qualifications of such person for such appointment. No permanent appointment to fill any position shall be effective until at least 14 days have elapsed following such posting to permit the reasonable consideration of all applicants. This section shall not apply to positions covered under the civil service law and rules or if in conflict with the provisions of a collective bargaining agreement.