Do foreigners need a visa for Phu Quoc Island in Vietnam

I have read in some travel websites that foreigners can visit Phu Quoc Island in Vietnam without any visa required. Is it true and for which nationalities will this apply? Let's explain the rules and regulations for this special zone?

I could not locate an official government website that covers this fully.

It seem to be covered on some embassy's websites. For example the Vietnam Embassy in Romania states here

In case Phu Quoc is your only destination in Vietnam, you are eligible for a 30-day visa exemption on Phu Quoc no matter you are a foreigner or a Vietnamese holding foreign passport.

To enter Phu Quoc with no visa, visitors must meet the requirements below:​

• Your passport must be valid for 6 months since your arrival date or else you should renew it prior to taking the trip to Phu Quoc.
• You must fly from an international country to Phu Quoc via the Phu Quoc International Airport. This applies to direct, indirect and layover flights, where your final destination along the route is Phu Quoc. The onward destination could be any country, except Vietnam.
• Your stay on the island must be less than 30 days. You must provide proof (return airplane ticket, cruise ship departure date, etc.) that you will be leaving Phu Quoc Island within 30 days in order to be granted a "Visa Exemption Stamp".
• You have not been extradited from Vietnam in the past.
• You are not on the wanted person list of Interpol.
• You travel to Phu Quoc by sea (ship or cruise) or by air (airplane).​​ ​

While this is information for Romanian citizens, it appears to be the same rules for everyone.

From https://en.wikipedia.org/wiki/Visa_policy_of_Vietnam

Phu Quoc Island has a special visa exemption for all foreign visitors arriving directly by air or sea from outside Vietnam. Visitors can stay within Phu Quoc for a duration of 30 days.