Section 13. Labor. Every employee shall have the right to equal pay for equal work and to protection against risks to his health or person in his work or employment. All employees shall have the right to organize and bargain collectively, to strike and picket, and to engage in other concerted activities, except those public employees engaged in services essential to public health or safety, as determined by law. Section 14. Public Employment. All citizens shall have the right to seek public employment in the civil service of the Territory which shall be open to all on the basis of merit to be determined by competitive examination or other non-discriminatory methods. Section 15. Oath or Affirmation. No political or religious tests other than an oath or affirmation to support the Constitution and the laws of the United States of America applicable to the Territory and the Constitution and laws of the Virgin Islands, shall be required as a qualification to any office or public trust under the Government of the Virgin Islands. Section 16. Open Beaches. All beaches and shorelines of the Territory, as defined by law, shall be public and open to public use, provided that the Legislature shall have the power to enact reasonable regulations concerning the accessibility and use thereof. Section 17. Right to Healthful Environment. It shall be the public policy of the Territory to conserve, develop and use its natural resources in the most effective manner possible for the general welfare, and to provide and maintain a healthful environment for the benefit of this and future generations. The Legislature shall provide by law for the implementation and enforcement of this public policy. Each person has the right to a healthful environment. Each person may enforce this right against any party, governmental or private, through appropriate legal proceedings subject to reasonable limitation and regulation as the Legislature may provide by law. Section 18. Limit of Interpretation. The foregoing enumeration of rights shall not be construed restrictively. Nothing enumerated herein shall be construed to deny or disparage other rights retained by the people. Powers not delegated to the Government of the Virgin Islands or to the Government of the United States, are reserved to the people. Nothing contained in the foregoing shall be construed to limit the power of the Legislature of the Virgin Islands to enact laws for the protection of life, public health, social welfare and public safety.