The phrase "asserted that it needed" is correct and usable in written English.
You can use it when discussing a claim or statement made by someone regarding a requirement or necessity.
Example: "The committee asserted that it needed additional funding to complete the project successfully."
Alternatives: "claimed that it required" or "stated that it needed".
Slovenia has asserted that it needs to raise a total of 3 billion euro (about $4 billion) to pay down its budget deficit and rescue its banks, lest a collapse exacerbate an already-weak economy.
The transportation authority asserts that it needs to bring its soaring pension costs under control to stave off future deficits.
Seven years after the collapse of the Soviet Union it is dispiriting to find the Pentagon asserting that it needs ever larger budgets to insure that American forces can quickly and effectively deal with potential threats like Iraq and peacekeeping assignments like the one in Bosnia.
This year's response rate may have been dampened when some Republican leaders complained that the long form -- sent to one in six households -- contained intrusive questions about the number of bathrooms and residents' mental condition, and asserted that it need not be completed in full.
In a statement on Thursday, Twitter said that it was reviewing legal options, but earlier this month the company asserted that it would need an order from an American court before it would, or could, disclose personal details stored on servers here.
With Judge Gary's approval, the prosecution asserted that it did not need to prove who had thrown the bomb.
The administration asserted that it did not need court approval because of the president's inherent war powers, but critics on the left and right said the program violated the law.
The state rail authority repeatedly has asserted that it will not need a subsidy and that every high-speed system in the world operates without taxpayer assistance — despite significant evidence to the contrary.
