Since October 2017, all owners of quadrocopters and other unmanned aerial vehicles (drones) are required to register their devices with the National Television and Radio Commission of Thailand (NBTC). In case of violation of the order, Thai law provides for a penalty of up to five years in prison and / or a fine of up to 100 thousand baht (about 3 thousand US dollars). Mandatory gala dinner fees may apply at Thailand hotels. Guests should contact the hotel directly for more information. Under the new immigration procedures, effective May 1, 2025, all foreign nationals entering Thailand by air, land or sea must complete the Thailand Digital Arrival Card (TDAC) online form on the official website of the Bureau of Immigration of Thailand three days prior to arrival. Please inform Ongsa House in advance of your expected arrival time. You can use the Special Requests box when booking, or contact the property directly with the contact details provided in your confirmation. Payment before arrival via bank transfer is required. The property will contact you after you book to provide instructions. In accordance with government guidelines to minimise transmission of the Coronavirus (COVID-19), this property currently isn't accepting guests from certain countries, during dates where such guidelines exist. Due to Coronavirus (COVID-19), this property has reduced reception and service operating hours.