Marlowe is a lawyer. Long time. Successful. And ‘saving clause’ is a synonym for ‘severance clause’. Look it up.
Then Marlowe certainly knows it is not necessary to enact a new law every single time a state or federal court strikes down a law, in whole or part.
Sometimes yes, sometimes no. SCOTUS' wrong-headed decision in Obergefell did not invalidate the entirety of Kentucky's, or any other state's, marriage laws. Only as they apply to prohibitions against gay marriages.