Royal Society of Chemistry (RSC)

Mandatory

Output-based scheme with no minimum hours
Members must demonstrate activity in at least 3 of these 5 areas: work-based learning, professional activity, formal/educational, self-directed learning, other (eg voluntary work). 2.5% of those who revalidate their CChem or CSci are randomly selected and asked to provide a short reflective summary of their professional development activity.

Further Information:
http://www.rsc.org/