Online retailer Amazon on Monday emailed websites with which it formerly had an affiliate relationship inviting them to re-enroll in the revenue-sharing program.

“As you may have heard, California Governor Jerry Brown has signed legislation repealing the law that had forced us to terminate our California Associates. We are pleased to invite all California Associates whose accounts were closed due to the prior legislation to re-enroll in the Associates Program,” Amazon’s email stated.

In June, Amazon terminated its affiliate advertising program, involving some 10,000 websites after Gov. Jerry Brown signed a bill, AB X28 1, to require out-of-state online retailers to collect sales tax from California customers.

In affiliate programs, a website can collect a commission if its visitors click on a retailer’s ad and buy something.

The Supreme Court had ruled that states could not force online retailers to collect state sales tax if the retailer did not have a physical presence in that state, called “nexus.” California and several other states have passed laws saying that the affiliates are the nexus for these out-of-state retailers.

After mounting a referendum drive to repeal the California law, Amazon struck a deal with the state that postpones enforcement of the state law in order to give online retailers time to lobby Congress to pass a national law about sales tax collection.

Most California Amazon affiliates were small businesses with fewer than 75 employees, according to Rebecca Madigan, executive director of the Performance Marketing Association, a Camarillo-based national trade association for websites that had affiliate relationships with dozens of online retailers.

Of Amazon’s announcement Madigan said, “I’m pleased that Amazon is reopening its associate program in California and we hope the other hundreds of out-of-state online retailers that were forced to terminate their advertising program when the law initially passed will continue to open their programs in California … so that our affiliate members can truly get back in business at least for the next year.”

Brick and mortar retailers had supported the new law, saying they were at a competitive disadvantage because they have to collect sales tax, which in California is as high as 9 percent in some cities. Sales tax is 7.75 percent in all Orange County cities except La Habra, where it is 8.25 percent.

Only former Amazon affiliates whose accounts were terminated by AB X28 1 are eligible to re-enroll, Amazon said. Once re-enrolled they can start earning commissions again.

Click here for more information about Amazon’s offer to its former affiliates.