File under “One more thing for travel advisors to remind their clients about.”

Beginning January 8, travelers to the United Kingdom from non-European nations, including the United States and Canada, will need to take an extra step, as the new Electronic Travel Authorisation (ETA) system rolls out.

Whether just passing through a UK airport or planning a stay of six months or less—for tourism, family visits, business meetings, conferences, or study abroad—visitors will have to fill out an online form (available here: How to apply – Apply for an ETA to come to the UK – GOV.UK) and pay a £10 fee (about $12.75). Then as you prepare to board a plane, gate agents will verify your ETA status via digital link to your passport.

The Home Office says the system, like all biometrics in the travel industry, is designed to speed up the process and increase security.

While applications might be approved in a few hours, the site suggests allowing at least three days for them to come through. But why wait? Applications already are being accepted.

Once issued, an ETA is valid for two years or until the traveler’s passport expires, whichever comes first.

On April 2, the requirement to have an ETA will roll out to EU nationals as well. Only citizens of the UK and Ireland, and those with valid UK visas, will be exempt.