There is one summary for H.R.504. Bill summaries are authored by CRS.

Shown Here:
Introduced in House (01/12/2017)

The bill changes the days on which the POW/MIA flag is required to be displayed at specified locations to all days on which the U.S. flag is displayed. (Current law requires the POW/MIA flag to be displayed only on Armed Forces Day, Memorial Day, Flag Day, Independence Day, National POW/MIA Recognition Day, and Veterans Day.)