As stated Under 2. Ofsted grades Section 5.1.1. Criteria Section 1: Provider Details in the Statement of Requirements.
However, if appropriate training providers might be able to apply if acting as a subcontractor for an Ofsted assessed prime contractor under the following criteria:
Where providers are subcontracting for an Ofsted assessed prime contractor, the Ofsted grade of the prime must be a minimum Ofsted grade of 2 (Good). Providers are invited to submit provision evidence to be followed up with clarification discussions where required. Applicants should take a judgement on what evidence to supply.
The Mayor’s Academies Quality Mark - Statement of requirements for applications