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197 PP-98 1. All stations, whatever their purpose, must be established and operated in such a manner as not to cause harmful interference to the radio services or communications of other Member States or of recognized operating agencies, or of other duly authorized operating agencies which carry on a radio service, and which operate in accordance with the provisions of the Radio Regulations.
198 PP-98 2. Each Member State undertakes to require the operating agencies which it recognizes and the other operating agencies duly authorized in this purpose to observe the provisions of No. 197 above.
199 PP-98 3. Further, the Member States recognize the necessity of taking all practicable steps to prevent the operation of electrical apparatus and installations of all kinds from causing harmful interference to the radio services or communications mentioned in No. 197 above.