No employee of the City of Yonkers, whether of the exempt, noncompetitive,
competitive or labor class, except elected officials, shall remain
in the employ of the City of Yonkers longer than until and including
the last day of December next after he shall be 70 years of age, except
as otherwise provided by law, and except that this article shall not
apply to an employee of the City of Yonkers who has attained the age
of 70 years at the time this article shall become effective.