"Full devolution" means transferring all powers and responsibilities from a central authority to a regional or local level. It gives more independence and control to the region or local government to govern its own affairs. Full definition
The UK Government announces full devolution of business rates to Wales and the power to create new Welsh taxes. (itv.com)
In its submission1 to the Smith Commission on devolved powers to Scotland, the Chartered Institute of Taxation (CIOT) has suggested a hybrid approach to devolution that includes both full devolution of some taxes and the possible assignment of an appropriate share of revenue of taxes collected in Scotland. (politics.co.uk)
Full devolution — meaning federation — is the key to decentralisation and localisation, both from Westminster to the four nations and within each of the four nations. (nextleft.org)