From Ballot Access News

On June 20, the New York legislature passed A8228/S6532. It eases the deadline for registered voters to switch parties. Current law says they can’t vote in the 2020 primaries if they hadn’t joined the party by October 2019. The bill changes that deadline to February 14, 2020. The presidential primary is in April and the primary for other office is June; the February 14 deadline would apply to both primaries.

For a reason not understood by me, the legislature has never sent that bill to the Governor. Perhaps some commentator can shed some light on why.