Add the following requirement in section 7.3.2.1. VNF or PNF Configuration via NETCONF Requirements

7.3.2.1.3 LCM Operations via NETCONF
Requirement: xxxx 
target: VNF or PNF
keyword: MAY

introduced: frankfurt
As alternative to Ansible, Chef or REST, a VNF or PNF MAY support YANG models allowing execution of standard controller LCM operations including HealthCheck.
Note: To support vendor YANG models for LCM operations, the controller is responsible for performing VNF/PNF specific translation of north-bound API requests into one or more south-bound NETCONF requests.