National Communication Act No. 24 57. Vacating Frequency and Frequency Band. 58. Harmful Operations. CHAPTER IX PRICING AND FEES 59. Tariffs and Rates. 60. Methods of Setting Public Communication Services Tariffs. 61. Bases and Criteria for Setting Public Communication Services Tariffs. 62. Principles and Criteria for Pricing Interconnection Services. 63. Review of Public Communication Services Tariffs. 64. Coming into Force and Application of the Approved Tariffs. 65. Amendment of the Public Communication Services Tariffs. 66. Licence Fees. 67. Release and Type Approval Fees. CHAPTER X NATIONAL NUMBERING PLAN 68. National Numbering Plan, Number Portability and Internet Domain Names. CHAPTER XI STANDARDS, SPECIFICATIONS AND TYPE APPROVALS. 69. Standard Specifications. 70. Type Approvals. CHAPTER XII CONTRAVENTION OF REQUIREMENTS 71. Inspection, Monitoring and Detection of Contraventions. 72. Monitoring and Tracking of Electromagnetic Waves. 4