The United Arab Emirates has extended compulsory military service for Emirati men from 12 to 16 months.
Men who hold a high school diploma or its equivalent will serve 16 months instead of 12.
While those who do not have a high school qualification continue to serve for two years.
It kept participation for women, who can serve only for nine months, optional and requiring approval of their legal guardians.
The UAE introduced mandatory military service in 2014 for Emirati men.
The UAE is a key member of a Saudi-led military coalition that intervened in Yemen in 2015 against the Iran-aligned Houthi movement to restore the internationally recognised Yemeni government in exile.