CDR-14 and optional modules

[Michael Raskin]

                Hello
        I look at CDR-14 that says about putting :CDR-NN symbols into
*features* if implementation purports to implement a CDR. What is the
recommended behaviour in the case when the implementation provides 
a loadable module to support a CDR? Should the feature be always present
or only appear when the module is loaded?
        What are the opinions?

        Thank you, good bye
Michael Raskin