Sentence:  Had the original work been permitted, it would be <WSD>grandfathered</WSD> into any code changes each time they occurred, Arvada officials said. The latest came in 2006. 
Meaning of the word marked with <WSD> tags:  To retain existing laws or rules only for people or organizations previously affected by them, and to apply new laws or rules to the unaffected people or organizations. (from 1950s)