Put a Law or Penalty into Use

Put a law or penalty into use crossword clue. A daily mail UK puzzle question on 1 Aug 2017. 6 letters

Answer: INVOKE

The power which they had been the first to invoke having thus declared so emphatically and persistently against them, the Donatists revived the old world-alien Christianity of the days of persecution, and repeated Tertullian’s question, “What has the emperor to do with the church ?”

The injured husband called to his aid Roderic, the high king (airdrigh) of Connaught; and in 1166 Dermot fled before this powerful coalition to invoke the aid of England.

It was thus natural that the citizens should invoke the aid of Savoy against their bishop, Robert of the Genevois (1276-1287).