Australian Standard (Harvard/General Technical Style):
Standards Australia. (1992). AS 1100.101—1992: Technical drawing—Part 101: General principles. Sydney, Australia: Standards Australia.
The AS 1100 series is a multi-part standard governing technical drawing in Australia. Part 101 specifically deals with the General Principles. AS 1100.101 1992 Technical drawing General principles.pdf
To put it simply, this document defines the "grammar" and "spelling" of technical drawing. It establishes rules for:
The official title is "Technical drawing - General principles," and it was originally approved for publication in October 1992. Australian Standard (Harvard/General Technical Style):
Lines are the "vocabulary" of technical drawing. AS 1100.101 defines specific line types based on line thickness and style.
The standard recommends only two distinct line widths for general engineering drawings: Standards Australia
The standard uses the ISO 'A' series paper sizes.
Note: Each smaller size is exactly half of the previous size.