The removal of the export keyword inadvertently deleted the text (previously found in Clause 13 [temp] paragraph 8 of the 2003 Standard),

A non-exported template must be defined in every translation unit in which it is implicitly instantiated (13.9.2 [temp.inst]), unless the corresponding specialization is explicitly instantiated (13.9.3 [temp.explicit]) in some translation unit; no diagnostic is required.

This requirement must be reinstated.