not carved in stone

Not Carved in Stone
Not carved in stone
Not Carved in Stone
Mom's Shadow Chills; Rules Not Carved In Stone
['The existing demarcation is not carved in stone'--the nurse practitioner]
Paris is burning over conflicting men's show dates; French designers say schedule not carved in stone.
Examiners Get New Guidance On ROA: 1% Not Carved In Stone.(Return on Average Assets)
Blueprint not carved in stone
It's not carved in stone
Don't Panic: Deadlines for Federal Income Tax Elections Are Not Carved in Stone