Those immigrants in highly-skilled occupations have been earmarked for a longer permission to stay in the United Kingdom, as much as five years while low-skilled workers will only have a period of two years.
One source involved in the discussions said: "I'm not going to pretend it's an easy job", and in reality much of the detail is a long, long way off.
Fellow Tory MP Suella Fernandes, the ERG's chair and also Parliamentary Private Secretary to Treasury ministers, hailed an "impressive piece of work" that exposes the EU's "weak" claims. They may have to apply online for travel authorisation. "They are seeking to get money, that is what it is about".
It will not be possible to reside in the United Kingdom while seeking work, unless you can show you have "sufficient funds". Instead, they will become temporary workers with a maximum two-year permit.
A separate analysis, published by the U.K. Office for Budget Responsibility in 2013, found that higher net migration would reduce pressure on government debt over time because incoming migrants are more likely to be of working age than the population in general.
This will be followed by an implementation period and the final stage will see the new rules being put into place. This is something that many other member states do, for European Union and non-EU nationals - as the paper is keen to point out in a nod to its negotiating position with the EU.
Employers could also be forced to recruit Britons to certain jobs and access would be denied to immigrants wanting to work in some low-skilled sectors, the document suggests. Note how the United States attorney general, Jeff Sessions, when he announced the proposed scrapping of Daca on Tuesday, made a similar connection, suggesting that allowing the 800,000 Dreamers to remain in the country had "put our nation at risk of crime, violence and even terrorism" - even though that is wholly untrue (Dreamers lose all protection if they commit a crime, and can be deported instantly).
It's important that the government talks to recruiters and employers who understand the realities of various sectors of the labour market and that policy isn't drafted on the basis of broad terms like "low skilled" and "high skilled" which can be interpreted in many different ways.
The policy paper says there is "virtually no limit" on who could qualify for a family member under European Union rules, and proposes that only direct family members should count, such as children and adult dependants.
"The Government is right to prioritise highly skilled and skilled migration", said MEP Steven Woolfe, a former member of UKIP.
And all this is just for the interim.
Mr Bradshaw added: "It's pathetic that the Government are reduced to begging companies to sign this letter, when they know there are precious few businesses that support their plan for a hard and destructive Brexit".
A period of at least two years following Brexit is foreseen to fully implement the plans.
Mr Howe, a member of the pro-Brexit Lawyers for Britain group, said: "In law, we will owe no money at all to the EU when we leave, with some small items being more than cancelled out by the value of the UK's shareholding in the European Investment Bank".