The phrase "although mandatory" is correct and usable in written English.
It can be used to introduce a contrast or exception regarding something that is required or obligatory.
Example: "The training session is scheduled for next week, although mandatory, attendance is encouraged for all employees."
Alternatives: "even though required" or "despite being compulsory".
And, although mandatory preregistration helps address a host of questionable research practices, it does not fully address publication bias unless publication following preregistration becomes mandatory across all the sciences.
Although mandatory rules might help some firms, particularly those that strayed from an optimal governance structure, there is evidence that imposing changes in board structure uniformly across firms is not suitable for the majority of companies and destroys firm performance, on average.
The thesis, although mandatory for students wishing to graduate with honors in International Studies, is open as an option to all International Studies majors.
Regular GPs participate in this service to varying degrees, although mandatory contracted to it [ 9].
Conventional pharmacokinetic/pharmacodynamics (PK/PD) models, although mandatory for predicting instantaneous drug activity, cannot serve this end.
Most cases we have studied demonstrated that scientific evidence based on systematic reviews of randomized controlled clinical trials, although mandatory, was rarely sufficient for recommendation making.
The Cayman Islands planned to close its main airport on Friday morning, although no mandatory evacuation will be issued, Tourism Minister Charles Clifford said.
Although we find no relevant case law interpreting the Field Code provision, prior to North Dakota's adoption of it, we find relevant interpretations after our enactment; and although not mandatory, California's interpretation of it is somewhat persuasive.
Paired Course: Although not mandatory, this course is meant to be taken in conjunction with GSD 5275 which is also 2 credits and meets at the same time as 5276.
The linkage of European currencies in a euro zone is to begin in one year, although the mandatory use of euro notes and coins is not scheduled to start until 2002.
