cherrim :
I don’t suppose we have the good fortune of this TECO explanation having been put in an email to you or otherwise in writing on a website though, right?
Thanks to post by @DesiInTaipei in “Spouse needs visa, but this damn virus” thread for lead to this link: 首頁.-衛生福利部疾病管制署
Q7:How is the three-day period calculated with respect to a certificate of a negative COVID-19 RT-PCR test result issued within three days prior to boarding the flight to Taiwan? Is the boarding day included?
A7:
1.Travelers should provide a certificate of a negative COVID-19 RT-PCR test result issued by a medical institution within three days prior to boarding the flight, and the three-day period of such certificate means three working days. Therefore, national holidays in the country/regions where the traveler takes the COVID-19 test may be excluded.
2.The three-day period of such a certificate refers to the three days prior to the day of the flight, excluding the boarding day. For instance, if an eligible traveler takes a flight to Taiwan on July 31, the traveler should provide his/her certificate of a negative COVID-19 RT-PCR test result issued on or after July 28.