The New SI: Some critical features and a critical review of the CCU 2016 Draft of the SI brochure

The paper is an adjourned digest of critical features to be considered should the proposed use of constants in the definition of measurement units of the SI be implemented: lack of a definitional realisation method; continuity requirement; individual base-unit definitions; possibility of future new determination of the numerical values of the constants; New SI hierarchy ladder. In addition, a critical review is presented of the text of the CCU 2016 Draft, Sections 1 and 2, of the 9th SI Brochure. Summary tables and a Glossary are included.