When can I apply for the Phuket Sandbox COE after receiving my second vaccine jab?

The user is inquiring about the appropriate time to apply for the Certificate of Entry (COE) for the Phuket Sandbox program following their second COVID-19 vaccine jab on August 10th, which allows them to be considered fully vaccinated as of August 24th. They question whether they can apply for the COE before the August 24th date, given the timeline of their vaccine certification and travel date. Community responses suggest checking with the local embassy or consulate for specific rules, emphasizing that travel cannot commence before 15 days post-vaccination, which would be August 25th.