The root of a CCD document must be ClinicalDocument in the HL7 namespace The ClinicalDocument/code element SHALL be present, and SHALL be valued with LOINC code 34133-9 (SUMMARIZATION OF EPISODE NOTE). A CCD SHALL contain exactly one ClinicalDocument / documentationOf / serviceEvent. The value for "ClinicalDocument / documentationOf / serviceEvent / classCode" SHALL be "PCPR" "Care provision" 2.16.840.1.113883.5.6 ActClass STATIC. ClinicalDocument / documentationOf / serviceEvent SHALL contain exactly one serviceEvent / effectiveTime / low and exactly one serviveEvent / effectiveTime / high. ClinicalDocument / documentationOf / serviceEvent SHALL contain exactly one serviceEvent / effectiveTime / low and exactly one serviveEvent / effectiveTime / high. CCD SHALL contain exactly one ClinicalDocument / languageCode. CCD SHALL contain one or more ClinicalDocument / templateId. At least one ClinicalDocument / templateId SHALL value ClinicalDocument / templateId / @root with "2.16.840.1.113883.10.20.1", and SHALL NOT contain ClinicalDocument / templateId / @extension. ClinicalDocument / effectiveTime SHALL be expressed with precision to include seconds. ClinicalDocument / effectiveTime SHALL include an explicit time zone offset. CCD shall contain one to two ClinicalDocument / recordTarget. CCD SHALL contain one or more ClinicalDocument / author / assignedAuthor / assignedPerson and/or ClinicalDocument / author / assignedAuthor / representedOrganization. CCD MAY contain exactly one and SHALL NOT contain more than one Purpose section (templateId 2.16.840.1.113883.10.20.1.13). CCD SHOULD contain exactly one and SHALL NOT contain more than one Payers section (templateId 2.16.840.1.113883.10.20.1.9). CCD SHOULD contain exactly one and SHALL NOT contain more than one Advance directives section (templateId 2.16.840.1.113883.10.20.1.1). CCD SHOULD contain exactly one and SHALL NOT contain more than one Problem section (templateId 2.16.840.1.113883.10.20.1.11). CCD SHOULD contain exactly one and SHALL NOT contain more than one Medical Equipment section (templateId 2.16.840.1.113883.10.20.1.7). CCD SHOULD contain exactly one and SHALL NOT contain more than one Immunizations section (templateId 2.16.840.1.113883.10.20.1.6). CCD SHOULD contain exactly one and SHALL NOT contain more than one Payers section (templateId 2.16.840.1.113883.10.20.1.9). CCD SHOULD contain exactly one and SHALL NOT contain more than one Advance directives section (templateId 2.16.840.1.113883.10.20.1.1). CCD SHOULD contain exactly one and SHALL NOT contain more than one Functional status section (templateId 2.16.840.1.113883.10.20.1.5). CCD SHOULD contain exactly one and SHALL NOT contain more than one Results section (templateId 2.16.840.1.113883.10.20.1.14). CCD SHOULD contain exactly one and SHALL NOT contain more than one Procedures section (templateId 2.16.840.1.113883.10.20.1.12). CCD SHOULD contain exactly one and SHALL NOT contain more than one Encounters section (templateId 2.16.840.1.113883.10.20.1.3).