Any public service company which is authorized to increase its authorized capital stock in accordance with the laws applicable to corporations organized under the general law may increase or reduce its authorized capital stock at a meeting of its stockholders warned and held for that purpose by a vote of at least two-thirds of each class of stock issued and outstanding at the time of such vote, or at a meeting of the stockholders called upon thirty days’ notice by a vote of at least two-thirds of each class of stock represented at such meeting. Nothing herein shall be construed to affect in any way the powers and authority of the Public Utilities Regulatory Authority with respect to issuance of securities by public service companies.