This is the 9474th most frequent Russian word.
указом
By decree.
The word 'указом' means 'by decree' and indicates the instrument by which the law was enacted.
Этот закон был принят указом президента.
This law was enacted by a presidential decree.
The word 'указом' here reflects the method of authorization involving a formal or administrative decree.
Губернатор открыл новый парк указом городской администрации.
The governor opened a new park by decree of the city administration.
The word 'указом' demonstrates that the changes in rules were officially approved through a ministerial decree.