Not compulsory or automatic
This last is the optional rule of the American Episcopal Church.
Optional expenditure includes the cost of.
Nature-study, continued in the secondary schools, is an essential part in the curriculum of these schools, and elementary general history, English, French and German are among the optional subjects.
for class ~ the prefectural roads were to be from 24 to 30 ft., and the dimensions of the village roads were optional, according to the necessity of the case.
The record of status, too, was made optional, and in 1856 was omitted from the schedule.