On one-way streets, there is NO PARKING on both sides of the street immediately before the crosswalk.
On two-way streets, there is NO PARKING before the crosswalk as you approach it.
The "No Parking" buffer is 20 feet before the crosswalk (about one regular parking space size).
This applies to every intersection, even if the crosswalk is unmarked (all intersection corners are considered crosswalks).
This applies to every crosswalk/intersection, even if the curb is not painted red or if there is no other sign restricting parking.