As an example, in the US the DoD requires combination locks be set to 50-25-50 when taken out of service, and combination padlocks to 10-20-30 (why the difference?). This is per a document 5200.1-R paragraph 6.4.6.2.1.4 (http://ipscontainer.com/pdf/DoD5200.1-R.pdf page 79 for example).