Apply this change, implying that the presence of a RequestToken overrides any other parameter.
There will be no test for this case,

Dennis to update the PSS.
Cos to update compspec.

RequestToken to be unique to the server.

I have started an Open-SCS PSS Version 1 Addendum 01, which will have the following text ("and the other parameters should be NULL and are not used.") in the method calls, as shown below:

• Request Token
  o If it has a value of zero, then this is the initial request for Serial Numbers.
  o If the value is non zero, then this is a follow on request because the number of Serial Numbers requested in a previous call were not available as an immediate response, and the other parameters should be NULL and are not used.

Table 5 (line 493)
change:
"If it has a value of null or an empty string, then this is the initial request for Serial Numbers.
If the value is non zero..."

to:
"If it has a value of null or an empty string, then this is the initial request for Serial Numbers.
If the value is non null.."