Minimum toilet to sink distance

I am trying to find out the minimum distance code requires between bathroom toilet and vanity sink. I assume the measurement is from the centerline of the toiet to the centerline of the vaniy sink? thanks for any help

I am in California

15" from centerline minimum in most places.

toilet

The measurement is from the centerline of the toilet to the edge of the sink or cabinet, and that distance is 15" or greater.