Dog walkers using walkways around Sovereign Harbour in Eastbourne must now keep their pets on a lead or risk receiving a fine.
Following consultation, Eastbourne Borough Council is implementing a new Public Space Protection Order (PSPO).
Residents were consulted over the changes and breaching an order could result in a fine of between £75 and £1,000.
PSPOs are measures that councils use to tackle anti-social behaviour.
Visit the PSPO page for more information.