(RAS AL-KHAIMAH, United Arab Emirates) — Bikinis and briefs are no longer welcome on some sands in the United Arab Emirates.

Authorities in Ras al-Khaimah, the northernmost emirate in the UAE, have posted signs on public beaches warning of possible fines for revealing swimwear such as two-piece bikinis for women and brief trunks for men.

The Abu Dhabi-based newspaper The National reports Monday that the move followed complaints from local families who didn’t like sharing the sands with tourists showing too much skin.The emirate is located about 100 kilometers (60 miles) northeast of Dubai.

The UAE hosts a patchwork of different social mores among its seven semi-autonomous emirates, ranging from conservative to relatively liberal. Dubai for example urges “respectful” attire but rarely objects to outfits such as miniskirts or bikinis.