This is the 3530th most frequent Russian word.
республиканского
"Республиканского" means "republican" (relating to a republic).
Here, 'республиканского' describes the council as being associated with the concept or institution of a republic.
Законопроект был предложен на рассмотрение республиканского совета.
The bill was submitted for review to the Republican council.
In this sentence, 'республиканского' is used to detail the government as being Republican in nature.
Этот памятник символизирует достижения республиканского правительства.
This monument symbolizes the achievements of the Republican government.
The word 'республиканского' in this context characterizes the state as being established under a republican system.