WASHINGTON (AP):  US President Joe Biden signed the National Defense Authorization Act into law Monday, authorising USD 768.2 billion in military spending, including a 2.7 per cent pay raise for service members, for 2022.

The NDAA authorises a 5 per cent increase in military spending, and is the product of intense negotiations between Democrats and Republicans over issues ranging from reforms of the military justice system to COVID-19 vaccine requirements for soldiers.

The Act provides vital benefits and enhances access to justice for military personnel and their families, and includes critical authorities to support our country's national defense, Biden said in a statement.

The USD 768.2 billion price tag marks USD 25 billion more than Biden initially requested from Congress, a prior proposal that was rejected by members of both parties out of concerns it would undermine US efforts to keep pace militarily with China and Russia.

The new bill passed earlier this month with bipartisan support, with Democrats and Republicans touting wins in the final package.

Democrats applauded provisions in the bill overhauling how the military justice system handles sexual assault and other related crimes, effectively taking prosecutorial jurisdiction over such crimes out of the hands of military commanders.

Republicans, meanwhile, touted success in blocking an effort to add women to the draft, as well as the inclusion of a provision that bars dishonourable discharges for service members who refuse the COVID-19 vaccine.

The bill includes USD 7.1 billion for the Pacific Deterrence Initiative and a statement of congressional support for the defense of Taiwan, measures intended to counteract China's influence in the region.

It also includes USD 300 million for the Ukraine Security Assistance Initiative, a show of support in the face of Russian aggression, as well as USD 4 billion for the European Defense Initiative.

In his statement, the president also outlined a number of provisions his administration opposes over what he characterized as constitutional concerns or questions of construction.

Those planks include provisions that restrict the use of funds to transfer or release individuals detained at the Guantanamo Bay detention center, which the Biden administration is moving to close.

Biden's statement said the provisions "unduly impair the executive branch's ability to decide when and where to prosecute detainees and where to send them when they're released, and could constrain US negotiations with foreign countries over the transfer of detainees in a way that could undermine national security.

The law also has provisions barring goods produced by forced Uyghur labor in China from entering the US, and it begins to lay out plans for the new Global War on Terror Memorial, which would be the latest addition to the National Mall.