This part of the Defence Standard defines the preferred techniques to be used for the measurement of the electromagnetic compatibility characteristics to limit the propagation and coupling of unintentional electromagnetic energy whether conducted or radiated. It covers the following types of equipment procured by the Ministry of Defence for all three Services. Man Worn, Man Portable Equipment, Line Replacement Unit (LRU) and Sub-Systems and Support Equipment Requirements. It also covers any specialised EMC Test Equipment Requirements.

The procedures and limits outlined within this part of the Defence Standard are generally more stringent than those evoked by EMC legislative requirements. These reflect the harsher environment in which military equipment will operate. It is not permissible or acceptable to compare or cross reference test results from Euro Norms or Commercial Specifications with the procedures and limits contained within.