The ETA portal lists USD 50 for countries outside South Asia and USD 20 for South Asian countries. It says the tourist ETA is free for 30 days for nationals of 40 listed countries from 25 May 2026, for Singapore and Seychelles (30 days) and the Maldives (90 days) under reciprocal and bilateral agreements, and for children of any nationality under 12 (up to 30 days).
Arriving from Tanzania, no yellow fever certificate is required: WHO does not list Tanzania as a transmission risk. It can still be demanded if you have been in a risk country shortly before arriving.
Other entry requirements
Passport validity — The ETA portal says ETA holders need a passport valid for not less than 6 months from the date of arrival.
International Health Regulations (2005), Article 36 and Annex 7; WHO International Travel and Health, Annex 1, 18 November 2022 (revised 3 January 2023)