If any Person while fishing in the River for Salmon takes or captures any foul, unclean, or unseasonable Salmon, he shall immediately put back such Salmon into the River with as little Injury to such Salmon as possible; and every Person convicted of offending against this Enactment shall for every such Offence be liable to a Penalty not exceeding F1£25F1level 1 on the standard scale for each Salmon so taken and not put back as aforesaid.