In cases of planned water withdrawals for which licences were granted before the entry into force of this Act, the protection of waters below the point of withdrawal shall be guaranteed by the measures required by the law in so far as this is possible without causing infringements of existing water utilisation rights which would require compensation. No right of compensation shall exist in respect of measures taken under Article 31 of this Act in cases where licenses were granted after June 1, 1987.
In cases where overriding public interests require more extensive protection, the authorities shall require all necessary measures to be taken in accordance with this Act. The procedures for ascertaining whether compensation must be paid and fixing their amount shall be based on the procedures contained in the Compulsory Purchase Act of 20 June 19301.
The authorities shall require such measures to be taken at the latest before the commencement of the building work for the water withdrawal installation in question.