The PSMA stands for the 'Public Sector Mapping Agreement'. It licences all public bodies to legally use Ordnance Survey maps and address databases for their work.
This includes bodies such as District, Borough and County Councils, the Police, the NHS, and, of course Town and Parish Councils. It was established by Central Government and is funded centrally, removing the need for each public body to pay for the mapping seperately. This means it is 'free at the point of use'.
As a result you will need a PSMA Licence Number if your Town, Community or Parish Council wishes to use Parish Online as it contains the Ordnance Survey Maps and Address Databases provided through the PSMA.
Registering is easy, simply fill in the form using this link and select the 'I am applying to join the Public Sector Mapping Agreement (PSMA) and agree to the terms & conditions for both the PSMA and Royal Mail's PSL Use Terms' option in the Application Type Section.
After registering you will be assigned a PSMA license number which will look similar to this: 100012345. Once you have your license number you can then sign up to Parish Online and enter the number when prompted.
You will not be able to sign up to Parish Online without a valid PSMA number.