Ans: As a Designer you can use any of the projection method 1st Angle or 3rd Angle there are no restrictions to it.
In INDIA, earlier we used the first angle projection system. The Indian Standard Institution published the versions of ‘INDIAN STANDARD CODE OF PRACTICE’ in 1955 and its revision in 1960 and they recommend the use of third-angle projection method.
While in the later revision version in December 1973, the committee has left the opinion to choose on designer or user. They can use either of the projection methods.
The method of first-angle of projection is British standard practice.
America and the continents of Europe follow third-angle projection.