Section 7(1)(b) provides that it will be unlawful for an employer to discriminate against an employee "in the terms on which he offers that person employment". This will include the length of any contract or the availabilty of training and selection programs upon which any offer is conditional. Unjustifiably treating someone less favourably than another person on the grounds of their age will amount to discrimination.
I guess the key here is whether MAPS scheme amounts to an offer of employment..I haven't looked at it in any detail however if it is like most mentored/scholarship schemes it will not per se amount to an offer of employment. Lawyers can be very literal if they want to.
As I said not looked at it in much detail so not 100% sure