According to the article, it was Reagan.
Reagan was Pres but I don’t think he had any thing to do with it. The article said the RNC and RSC did it on their own.
No it was the GOP national committee officials. I suspect they wanted to get the defendants of the Civil Rights lawsuit off without jail time or a crippling fine—and to give them some credit, they probably didn’t foresee this document would renew until the next century.