How soon could US states outlaw abortions if Roe v Wade is overturned?

If the draft supreme court decision is not substantially altered it would result in 26 states banning the procedure

An unprecedented leak of a draft supreme court decision shows a majority of justices support ending federal protections for abortions in arguably the most controversial court case in generations.

While the draft could still change, if it is not substantially altered it would result in 26 states immediately or as soon as practicable banning abortion, a sea change in the American legal and political landscape.