The document signed by Mr Williamson and Sir Jeffrey says that the DUP's support in votes which are not covered by the supply and confidence agreement will be agreed "on a case-by-case basis".
The DUP leader said the financial support would be made up of £1bn in new funding over the coming two years, as well as "new flexibility" in nearly £500m already committed to the region. If the parties can not come to an agreement by Thursday, Northern Ireland may be returned to direct rule from London.
The Northern Ireland party is pledging to vote with Conservatives on two topics that are at the forefront of British politics: national security - particularly in the wake of recent terrorist attacks - and the U.K.'s exit from the European Union.
"We also share the desire to ensure a strong government, able to put through its program and provide for issues like the Brexit negotiations, but also national security issues", May said after the deal was signed.
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After being one of several shows on the cancellation bubble , Netflix has officially cancelled the comedy series Girlboss . Netflix's chief content officer Ted Sarandos asked at the Produced By conference earlier this year.
As part of the deal, the Conservatives have agreed to keeping the pensions triple lock, and have said there will be no means-testing of the winter fuel allowance for pensioners.
The DUP said that it would back the government in any confidence votes and to pass budgets, as well as supporting it on Brexit-related legislation.
Northern Ireland's political parties are still locked in negotiations to form a semi-autonomous power-sharing executive for the province, almost four months after local elections there.
Speaking outside No. 10 Downing Street on Monday, Arlene Foster, the leader of the DUP, said a deal had finally been reached to protect Theresa May's grip on power.
The ruling Conservative party won 318 seats in the 650-member House of Lords in the June 8 election, falling short of the required majority mark of 326; the DUP won 10 seats.
Jimmy Butler traded to Minnesota Timberwolves: 7 numbers you need to know
They have a basis to work from, but things have changed and they've changed and adapted. "I don't have any complaints". The two players would have been fine, but again, I have no idea what the Wolves' draft strategy was going to be.
"Northern Ireland needs a functioning devolved government at this important time". He said the issue is not funding for Northern Ireland, but that the money has to be allocated under the Barnett rules.
The deal could act as an incentive for Northern Ireland's political parties to return to the country's Parliament after months of deadlock over the power-sharing assembly.
The agreement covers the length of the Parliament but will be reviewed after each session.
Agreement allows the Conservatives to govern despite losing their parliamentary majority.
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You can't do it to a side like Queensland . "Last night, I would have said it to them as they were leaving the field", he said. The Cowboys playmaker was clearly hampered by the injury but bravely played on despite being targeted by the Blues.
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