Thank you for your feedback. JustCode wants that every acronym longer than 2 characters to be pascal-cased. Currently, you cannot set acronyms that are allowed to be upper-cased in JustCode.
This, however, is something that we intend to implement. Here is a link for a PITS item where you can vote for it: http://www.telerik.com/support/pits.aspx#/public/justcode/9473
As a temporary workaround you could add a secondary naming rule for namespaces that has PascalCase as a rule and "ALC" as a prefix. If some of you namespaces end with BLL or DAL you could add a naming rule with ALC as a prefix and BLL or DAL as a suffix.
If you have any more questions or remarks, please do not hesitate to contact us again!
the Telerik team
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