But to answer your question:
It probably depends on the jurisdiction.
After the October 2003 fires here, virtually every jurisdiction decided to take action against wood shake/shingles. Some require the wood roof to be replaced when the property is sold, some require the wood roof to be replaced within five years of a certain date, and some that require the wood roof to be replaced within five years of a certain date—not when property is sold, though—have financial assistance or incentives in place to help.
I believe all city jurisdictions here, as well as unincorporated areas in the County, forbid installing wood roofs on new construction.