Senate leader Richardville says the marijuana legislation is driven by "the fact that medical marijuana was voted in, but (authorities) didn't have a way to regulate it — and still don't have a way to regulate it."
Such changes would be the first to the law approved by Michigan voters in 2008.
The House has already passed versions of the legislation.
Critics say the proposed changes might make the drug harder to get for those in need.
Personal Property Tax
It's the House's turn to take up the personal property tax — specifically the legislation passed by the Senate that would eliminate the taxes businesses pay on computers and equipment.
Supporters said the bills would remove a personal property tax that's not charged by neighboring states and make Michigan a more attractive place to do business.
Critics counter that they would further cut funding for already hurting school districts and local governments.
Local jurisdictions would be reimbursed by the state as business tax credits for battery manufacturers and other companies expire.
But none would be completely repaid.
The rollback of the tax is expected to amount to $600 million a year once it's fully phased in about a decade from now, but the state thinks it will be able to make up most of that money to local jurisdictions once the battery credits and other tax credits expire.