Actions by the House and Senate yesterday apparently cleared the way for congressional approval of the administration's six-year, $4 billion aid package for Pakistan, despite Pakistani refusal to satisfy U.S. concerns about its program to develop nuclear weapons.

Approval of the aid package would assure Pakistan's continuing support for U.S. covert military assistance to guerrillas fighting occupying Soviet forces in neighboring Afghanistan.

The Senate Appropriations Committee yesterday approved a bill that would effectively allow resumption of U.S. aid to Pakistan without requiring it to place its nuclear facilities under international safeguard unless rival India also agrees to the safeguard.

The House also acted to prevent Rep. Stephen J. Solarz (D-N.Y.) from introducing an amendment to a government spending bill that would have required the president to certify that Pakistan is not enriching uranium above the 5 percent level at its secret Kahuta nuclear plant.

When a nation produces uranium that is enriched more than 5 percent, experts think that it may be on its way to producing weapons-grade material, which is 95 percent enriched.

U.S. officials have recently indicated they can no longer provide the kinds of assurances Congress has been demanding that Pakistan is not enriching above the 5 percent level.

These actions seem certain to enrage India, because the legislation puts the onus on that country to force the United States into taking action to end Pakistani efforts to build a nuclear bomb. {Details, Page A32.}

One congressional source said the legislation represented "an attempt at a balancing act" between Pakistan and India, rival neighbors that many U.S. officials fear are on the verge of a nuclear arms race.

The Senate action, unless reversed on the floor, apparently would end the requirement that the president provide "reliable assurances" that Pakistan is not involved in building a bomb before aid could be granted. It would also set a precedent by treating equally Indian and Pakistani nuclear policies.

Aid to Pakistan has been cut off since Sept. 30 and cannot resume, in any event, until Jan. 15.

Both Pakistan and India have nuclear facilities that they have refused to open to outside inspection. Both governments have said publicly they are not engaged in building nuclear weapons.

The new language contained in the Senate committee bill states that no country in South Asia may receive any U.S. aid or obtain licences to buy sophisticated U.S. technology until the president determines it is is not producing weapons-grade enriched uranium.

The bill would permit U.S. aid to Pakistan or India in exchange for agreeing to place the facilities producing those nuclear materials under international safeguards.

The bill also allows the administration to waive the prohibition on aid to a country producing weapons-grade materials if the president certifes that another nation in the region is producing weapons-grade uranium or plutonium.