The central register/database of National Occupational Standards (NOSs) contains all current NOSs developed by all Sector Skills Units (SSUs) and approved by the Occupational Standards Center (OSC).

The register/database of NOS is developed and governed by the OSC. NOSs registered in this register/database are available for employers, learners and other stakeholders to access freely, regardless of their sector/industry/area of activity.

Each NOS consists of a set of Unit standards (US) for an identified job role and is identified with a unique registration number in the NOS register/database. This is made up of several letters and numbers with the first 2 letters referring to the sector/industry code, the next set of letters characterizing the NOS (for unit standards it is “US”), then the next 2 digit numbers reflecting occupation code as per the Occupational Map and the final 2 digit numbers reflecting the Job Role as per the Occupational Map. As an example, a NOS with a unique registration number such as “OG-NOS0101” was developed by and for the oil and gas (OG) sector/industry, for the occupation of Drilling Operations (01) and the job role of Assistant Driller (01). The graphical representation of the coding system for the National Occupational Standards and Unit Standards are provided below:



The register/database will always show the most current NOSs as whenever NOSs are updated they will replace the previous versions. These older NOSs are either archived and removed completely or marked as Legacy. Legacy means that the NOS may still be used in qualifications and so is still required. These can be identified by having the word Legacy at the end of the title and have the letter “L” at the end of the unique registration code.


ALL developed NOSs will be published on this register/database and websites of the respective Sector Skills Units.