The Scottish government recommended to its Parliament (Holyrood) to withhold consent for the so-called “Great Repeal Bill.”

In a paper submitted to Holyrood on Tuesday, the government argues that the bill that ends the supremacy of EU law may undermine devolved governance by reinforcing re-centralization.

The issue at hand is the distribution of power between the center and the constituent parts of the UK. The Scottish government document is also endorsed by the Welsh government, although the country voted to leave the EU in the referendum of June 2016.

“Along with the Welsh government, the Scottish government cannot recommend to the Parliament that it gives consent to the bill as currently drafted,” the document reads according to Reuters.

The Scottish first minister Nicola Sturgeon told the BBC on Wednesday that it is seeking an amendment on the bill to ensure devolution gains over the last 20 years.

Scottish and Welsh governments do not have a veto power over the bill. However, refusing to take their views into consideration threatens to tilt the political balance in favour of nationalists.

The UK government Scotland Minister, Mike Russell, offered reassurances that the bill does not seek to undermine devolution but offered no commitment towards an amendment of the Great Repeal Bill. However, he promised significant devolution of repatriated powers from Brussels.