The word from London is that Sinn Fein will push for devolved powers for Northern Ireland and membership of the Eurpean Economic Area in order to lessen the pain of Brexit.
The EEA provides for the free movement of persons, goods, services and capital within the European Single Market. All EEA countries adopt most EU legislation concerning the single market, notable exclusions being laws regarding agriculture and fisheries.
The Northern Ireland Act 1998 allows for the transfer of powers to NI including the right to negotiate relations with the EU, which are currently excluded under Schedule 2.
Sinn Fein believe that membership of the EEA and devolved powers are the only way to preserve the existing border arrangements and minimise the impact of Brexit. Special arrangements will have to be made for agriculture such as excepting NI farmers from EAA restrictions. Dublin would need to apply pressure on the EU to gain concessions.
Sinn Fein have sounded out opinions from other parties in NI. All are supportive bar the DUP which is opposed idea of more devolved powers for NI as they believe devolution weakens the Union.