The Greater Boston Chamber of Commerce weighed in with House and Senate negotiators on key aspects of economic development and job creation legislation that’s being worked out by a six-member conference committee, putting its support behind the House’s plans to boost housing production in Massachusetts and legalize sports betting.

In a letter to that conference committee, chamber president James Rooney urged lawmakers to adopt the House proposal to allow cities and towns to “loosen zoning supermajority requirements” to a simple majority, saying the change “can spark the momentum needed to address the state’s housing crisis while still balancing existing municipal authority.”

The Senate passed that language, but added other housing production and mandatory multifamily zoning measures and the chamber of commerce said it is “opposed to any provisions that would impose state-set zoning standards, override local decision-making, or create new avenues for costly and unnecessary litigation.”

The chamber also urged adoption of three Senate proposal to extend certain regulatory approvals in effect between March 10, 2020 and March 10, 2021 for one additional year, create an income tax deduction for individual filers receiving forgivable Paycheck Protection Program loans, including sole proprietors and pass-through entities; and stop bad faith patent demand letters, a proposal the business group said needs further clarification.

The chamber wrote to the conference committee, led by Rep. Aaron Michlewitz and Sen. Eric Lesser, on July 31, after the House and Senate had voted to extend formal sessions and give themselves more time to iron out the bill’s details while being mindful of the need to act quickly to bring down the state’s highest-in-the-nation unemployment rate.