not compulsory

References in periodicals archive ?
They ask for a donation in return but it is not compulsory to give one.
As registration is not compulsory, this figure does not reflect the total number of Irish citizens living in or visiting Egypt," the spokesman said.
Bright clothing preferred if possible, but not compulsory.
The Financial Conduct Authority (FCA) urge IFAs to display their fees clearly but the practice is not compulsory.
Major General Khamis Mattar Al Mazeina, Dubai Police Chief, said the buses are not compulsory, and people can still use their cars to get to the Dubai Police headquarters.
Masao Ichikawa of the University of Tokyo and colleagues analysed data on about 100,000 car crashes between 1995 and 1999 in Japan, where rear seatbelt use is not compulsory.
Since the interest payment by SRLEV due on 19 December 2014 is not compulsory under the Terms and Conditions, there is no legal obligation for SRLEV to pay.
The MP noted that the first extension of the parliament's mandate in 2013 took place in presence of a President of the Republic, stressing that the reasons given for the current second extension are not compulsory neither at the political nor security levels.
CONTRARY to popular belief, and the report on your "Go Green" pages (August 19), it is not compulsory to have a "smart meter" fitted.
The umrah is not compulsory but highly recommended.
Military service is not compulsory in the other three Gulf monarchies, with Saudi Arabia, Bahrain and Oman employing professional armies.
In total, 75% of those questioned said that they would pick to take maths at GCSE, even if it were not compulsory, with the subject slightly more popular with boys than girls.