Posted by Sha
As of 9 Sep 2016:
Feedback of any enquiries or errors to events_at_athletics.sg.
For the relay, there will be two categories, lower (35 – 50) and upper (55 – 80+). The upper category can run/join in the lower category, but the lower category cannot run/join the upper category.
Singapore Masters Open Track & Field Championships 2016 page