What is the "E-file Signature Authorization" for New York that has to be signed within one day of acceptance?

The Electronic Filing Instructions for New York have a section saying "Sign and date E-File Signature Authorization within 1 day of acceptance." This seems to imply that there is something to be done after the return is accepted - or is it just referring to the steps we had to take immediately before filing? The instructions for the Federal return (also e-filed) do NOT contain this language.