I created a new CCD file from HealthFrame and ran it against the NIST validation tool selecting the CCD option.  The result is as follows:

CDA R2 Errors: No errors!

CDA R2 Warnings: No warnings!

CCD:

Schematron Report

Schematron schema for validating conformance to CCD documents

A problem observation SHOULD contain exactly one Observation / effectiveTime, to indicate the timing of condition (e.g. the time the condition started, the onset of the illness or symptom).

Location: /ClinicalDocument[1]/component[1]/structuredBody[1]/component[2]/section[1]/entry[12]/act[1]/entryRelationship[1]/observation[1]

Test: count(cda:effectiveTime)=1