Change clause 11.5.2.3 "Use of accessibility services" from a "shall" into a "should"
As described in the attached discussion document about the testability of clauses 11.5.2.X clauses, clause 11.5.2.3 has been causing serious problems in testing conformance to EN 301 549 as this one requirement requires that 13 other requirements are met! In a meeting of STF614 there appeared to be general consensus that this problem can be completely solved by converting 11.5.2.3 into a "should" requirement.
This solution preserves the general guidance that full use should be made of all accessibility services, but only requires the use of specifically named accessibility services. The overall testability problem caused by 11.5.2.3 will have been removed, whilst preserving the important guidance that this clause contains.