Information concerning the ability to take advantage of the ten-week hour reduction can be found on the State Aid Resources for Pennsylvania Public Libraries LibGuide, State Aid Overview Library Hours.
The main thing to remember is that a library can only take part in the ten-week reduction of weekend hours if they maintain the total number of weekly open hours during that reduced weekend time period.
If you need more clarification after reviewing the information within the referenced LibGuide, please reach out for further clarification.