Changes made by Commission Directive 1999/23/EC of 9 April 1999 adapting to technical progress Council Directive 93/33/EEC on protective devices intended to prevent the unauthorised use of two- or three-wheel motor vehicles
EU Directive 1999/23
No changes made by Commission Directive 1999/23/EC of 9 April 1999 adapting to technical progress Council Directive 93/33/EEC on protective devices intended to prevent the unauthorised use of two- or three-wheel motor vehicles are recorded.
From legislation.gov.uk's record of changes, the official one: see it there.