The phrase "as being mandatory" is correct and usable in written English.
It can be used when emphasizing that something is required or obligatory in a specific context.
Example: "The new regulations are being implemented as being mandatory for all employees to ensure compliance."
Alternatives: "considered mandatory" or "deemed necessary".
In September, he submitted a retirement letter, as is mandatory for bishops who turn 75, and awaits the pope's decision to accept it or not.
In my New York hotel, I watched an overheated Fox commentator begin railing about socialism and before long Republican presidential candidate Mitt Romney took up Fox News' cue as is mandatory for any Republican politician.
Its chiefly male membership of clerics and scholars has rejected proposals to change Muslim personal law, and is opposing a demand by women's groups that marriages be legally registered, as is mandatory for non-Muslims.
A biocompatible material was used to manufacture the surgical device, as is mandatory for all such devices with an intended medical use.
As is mandatory for the members of the Ivy League, Dartmouth College does not offer athletic scholarships.
Crane's status as a wunderkind was quickly evident; although he was entirely self-taught, at 14 he ran 89 balls in straight pool at a local pool room, calling each shot in advance, as is mandatory in straight pool.
When the system is vented, as is mandatory with open infusion containers, there are extra risks of extrinsic contamination.
This is life imitating comedy — that old line about a liberal being someone who doesn't care what you do as long as it's mandatory.
The safety of vasoactive drugs regarding the cerebral vasculature is not well documented; therefore, titrating vasoactive drug doses as low as possible is mandatory.
The study will comply with the Data Protection Legislation which requires data to be anonymized as soon as it is mandatory to do so.
