By Jayne McCormack
BBC News NI governmental correspondent
First came the backstop, past the protocol, present we tin expect to perceive a batch much astir the "Stormont brake" arsenic it is added to the Brexit lexicon.
But could the aforementioned brake being hailed by Rishi Sunak successful his caller Brexit woody extremity the year-long interruption successful devolved authorities successful Northern Ireland?
The program aims to springiness a aboriginal Northern Ireland Assembly a greater accidental connected however EU laws use to Northern Ireland - a cardinal request of the Democratic Unionist Party's earlier it volition extremity its boycott of power-sharing.
Why is the UK authorities introducing this?
Under the protocol agreed by the UK and EU backmost successful 2019, immoderate EU laws connected goods and customs use successful Northern Ireland but politicians astatine Stormont had nary ceremonial mode to power those rules.
They, arsenic good arsenic immoderate businesses, had been calling for a wider consultative relation - thing that had been ruled retired nether Boris Johnson's administration.
The caller woody introduces a mechanics to let elected representatives successful the Northern Ireland Assembly to rise an objection to a caller goods rule.
How would they bash that?
According to the authorities it involves a saltation of a well-run and astatine times arguable Stormont instrumentality known arsenic the petition of concern.
It is simply a safeguard process agreed arsenic portion of the Good Friday Agreement successful 1998, primitively designed to support the rights of minorities.
A petition of interest usually requires the signatures of 30 MLAs (members of the legislative assembly) from 2 oregon much parties, meaning an contented would past beryllium taxable to a cross-community ballot requiring a bulk of unionists and nationalists, earlier it could proceed successful the assembly.
But critics said its presumption implicit clip efficaciously amounted to a veto for larger parties and it was reformed successful 2020 to restrict its use.
In this case, the authorities has decided lone 1 portion of that process needs to beryllium utilized by MLAs to emblem up their concerns to London astir a caller EU goods regularisation coming into effect.
So however would it work?
It requires 30 signatures - that threshold allows unionists unsocial to entity to regulations.
There are 35 MLAs from unionist parties successful the existent assembly and 2 autarkic MLAs who designate arsenic unionist.
Once that happens, it goes straight to the Westminster authorities for information - a cross-community ballot is not required.
When the UK has intervened, the EU instrumentality successful question would automatically beryllium suspended wrong a maximum play of 4 weeks, up of further autarkic arbitration with the EU via the Joint Committee, which oversees the cognition of the protocol.
The government's bid insubstantial states that this provides Stormont with a "genuine and almighty role" successful the decisions astir the exertion of EU laws successful Northern Ireland.
Crucially, it tin lone enactment erstwhile determination is simply a fully-functioning enforcement and assembly astatine Stormont.
Are determination different conditions attached?
Yes - portion the UK says it is doing this unilaterally to code the "democratic deficit" caused by the existent consent arrangements, the EU has besides made wide it views this arsenic an exigency brake.
It says the measurement tin lone beryllium utilized successful the "most exceptional circumstances and arsenic a substance of past resort".
The authorities states the mechanics cannot beryllium utilized for "trivial" reasons and that determination volition request to beryllium a wide objection that an EU goods regularisation being challenged is having a "significant" interaction connected mundane beingness successful Northern Ireland.
In addition, the authorities says the load of impervious for that volition prevarication with MLAs, to beryllium provided successful a "detailed and publically disposable written explanation".
The authorities expects determination to beryllium a consultative process first.
And the EU would besides beryllium capable to antagonistic the determination with immoderate remedial enactment it sees fit, raising the imaginable of a imaginable aboriginal stand-off.
Would Stormont get a vote?
That would not beryllium required to trigger the brake, but it has been suggested arsenic a imaginable mode of releasing the brake.
The authorities says a determination connected whether to permanently artifact an EU rule, erstwhile suspended and pursuing treatment successful the Joint Committee, would not hap "in the lack of a cross-community vote".
The process has yet to beryllium worked retired afloat and volition necessitate consultation with the Stormont parties.
It would besides mean authorities is needed to amend the Northern Ireland Act 1998, authorities that established the existent governance operation astatine Stormont.
There are besides further caveats.
The authorities says it could inactive show "exceptional circumstances" to warrant imposing the caller rule, adjacent if a ballot astatine Stormont made wide its opposition.
DUP erstwhile lawman person Lord Dodds has been captious of this, saying it means Stormont volition not "have the last say" connected specified matters.
Could the DUP backmost the plan?
The Stormont brake is conscionable 1 portion of the caller statement - albeit a precise large portion and 1 Rishi Sunak is keen to promote.
Some successful authorities accidental the DUP should chalk this up arsenic a triumph erstwhile aft all, it is among the party's 7 tests for a deal.
The DUP leader's archetypal absorption connected Monday gave small distant but Sir Jeffrey Donaldson near himself country for manoeuvre.
Securing the DUP's backing volition beryllium connected however the last ineligible substance stacks up with what has truthful acold lone been outlined successful slim detail.
Other Stormont parties person expressed reservations astir the connection saying they stay unclear astir what it volition really require, and judge it could beryllium excessively almighty a instrumentality handed to unionist parties.