Participants had difficulty in consistently assigning specific diseases to 'bins' that were considered obligatory versus optional for disclosure.
Hence the spread of the niqab, which some Deobandi preachers consider obligatory for women, in places such as Leicester where it was until recently uncommon.
In addition to Abacha lapel pins, now considered obligatory for army officers, the President's campaign has begun distributing deeply discounted color television sets and sacks of rice emblazoned with the general's name and image.
While black dress shoes have always been considered obligatory for suiting's, these days interesting color waves and laces offer equal refinement if not superior style.
There are ethical theorists who believe that our standards of distributive justice are far too minimalist and that much of what is considered supererogatory in the transference of wealth from the rich to the poor should really be considered obligatory.
Thus, a distinction is made in Western literature between moral duty and a supererogatory act, the former considered obligatory and moral duty 'proper' and the latter nonobligatory and optional, not being a 'proper' moral duty.
Prescribing neuroenhancers is outside the area of medicine that is considered obligatory for a physician, so under what circumstances should it be considered unethical or unacceptable?
In Russia, though, it was "considered obligatory [in progressive musical circles in Russia] to treat Tchaikovsky as a renegade, a master overly dependent on the West".
CE vaccines seek to focus responses on the most conserved segments of HIV-1 in order both to elicit CTL responses considered obligatory for viral control and to avoid CTL responses toward variant peptides that allow escape without hindering viral function and that may act as immunological decoys with no clear efficacy in terms of viral control.
Age, school grade, and sex were considered obligatory covariates, and the BMI was a mandatory covariate for blood pressure.
It should probably also consider obligatory reporting of notifiable diseases from the private sector against the current 'voluntary only' approach.
