372 ACTS, 1967. — CHAP. 499. (/) Nothing contained herein shall be construed to prevent Conference compliance with laws relating to audit or inspection of accounts by or on behalf of any government contributing to the support of the Conference. ARTICLE IX. CONSTRUCTION AND SEVERABILITY. This compact shall be liberally construed so as to effectuate the purposes thereof. The provisions of this compact shall be severable and if any phrase, clause, sentence or provision of this compact is declared to be contrary to the Constitution of any state or of the United States or the applicability thereof to any government, agency, person or circumstance is held invalid, validity of the remainder of this compact and the applicability thereof to any government, agency, person or circumstance shall not be affected thereby. If this compact shall be held contrary to the constitution of any state participating herein, the compact shall remain in full force and effect as to the remaining party states and in full force and effect as to the state affected as to all severable matters. SECTION 2. The "administrative head of the state police department" for the Commonwealth of Massachusetts, for the purposes of the New England State Police Compact set forth in section one, shall be deemed to be the commissioner of public safety. SECTION 3. The commissioner of public safety is hereby authorized to designate an alternate to serve in his place and stead on the New England State Police Administrators' Conference as permitted by Article III (b) and (c) of the New England State Police Compact; however, it is the intention of the General Court that said commissioner shall attend and participate in the work of the Conference in person to the maximum extent practicable. Approved August 2, 1967. Chap. 499. A N ACT PROHIBITING COMMON CARRIERS FROM ENGAGING IN ANT TRANSPORTATION EXCEPT ON A CASH BASIS I F TRANSPORTATION CHARGE IS NOT PAID WITHIN A CERTAIN TIME. Be it enacted, etc., as follows: . Chapter 159B of the General Laws is hereby amended by inserting after section 19 the following section: — Section 19A. Transportation bills for all transportation charges by common carriers of property by motor vehicle shall be presented or mailed to the shippers within seven calendar days from twelve o'clock midnight following delivery of the property. Such carriers may extend credit in the amount of such charges to those who undertake to pay them for a period of fifteen days, excluding Sundays and legal holidays, from the date of presentation or mailing of the transportation bills. If payment for transportation is not received by the carrier before the expiration of the period set forth above, such carrier is prohibited from engaging in any transportation operations for such shipper, except upon a cash basis, until final settlement and payment for the original transportation has been made. This section does not apply to the commonwealth and its political subdivisions and shall have no application to the transportation of rubbish, demolition waste and other waste materials. ACTS, 1967.—CHAPS. 500, 501. 373 The department upon determining a violation exists under this section, involving construction dump trucks, shall prohibit all such certificate holders under its jurisdiction from furnishing transportation services to the shipper involved in the violation until and unless the violation has been removed. Approved August 2, 1967. Chap. 500. A N ACT AUTHORIZING THE DIGHTON WATER DISTRICT TO BORROW CERTAIN SUMS OF MONEY FOR WATER PURPOSES. Be it enacted, etc., as follows: SECTION 1. The treasurer of the Dighton Water District, hereinafter called the district, with the approval of its board of water commissioners, is hereby authorized to borrow on behalf of the district amounts not exceeding the following sums for the following purposes and to issue bonds or notes of the district therefor: — (a) fourteen thousand nine hundred and eighty dollars for the acquisition of land or interests in land, for water purposes as described in the vote passed under article fourteen at the annual district meeting held during the current year; (b) eighty-five thousand dollars for the laying of water mains and the development and installation of a gravel-packed well and all necessary pumping equipment as described in the vote passed under article fifteen at said meeting; and (c) one hundred and forty-five thousand seven hundred and fifty dollars for laying water mains as described in the vote passed under article seventeen at said meeting. Such bonds or notes shall bear on their face the words, Dighton Water District Loan, Act of 1967. Each issue of bonds or notes under this section shall constitute a separate loan, shall be payable in not more than fifteen years from its date, shall bear such rates of interest as the treasurer and water commissioners of the district determine, and shall be signed by said treasurer and countersigned by said commissioners. Indebtedness incurred under this act shall not be subject to the debt limit for water purposes set forth in section eight of chapter forty-four of the General Laws but shall, except as otherwise provided herein,' be subject to said chapter forty-four. SECTION 2. Said treasurer, with the approval of said commissioners, may make temporary loans under the provisions of section seventeen of chapter forty-four of the General Laws in anticipation of the proceeds of the bonds or notes authorized by section one of this act. SECTION 3. This act shall take effect upon its passage. Approved August S, 1967. Chap. 501. A N ACT AUTHORIZING THE BOARD OF TRUSTEES OF THE STATE COLLEGES TO ACQUIRE CERTAIN PROPERTY IN THE CITY OF BOSTON FROM THE UNITED STATES OF AMERICA. Whereas, The deferred operation of this act would tend to defeat its purpose, which is to enable the board of trustees of the state colleges to accept forthwith, on behalf of the commonwealth, the conveyance by the federal government of certain property in the city of Boston, in order that said board may establish in and on such property an addition to