In any case where a tenant has served a tenant's request, the tenant may apply to the First-tier Tribunal on the grounds that—
the landlord failed to serve a landlord's initial response, or a landlord's full response, in accordance with regulation 12,
the landlord refused consent to the making of a relevant energy efficiency improvement specified in the tenant's request other than in accordance with these Regulations,
the landlord's counter proposal fails to comply with regulation 13, or
the landlord served a counter proposal and the tenant gave any consent and confirmation referred to in regulation 13(5)(b) which was required, but the energy efficiency improvement specified in the landlord's counter proposal was not made by the date specified in accordance with regulation 13(3)(e).
In any case where a superior landlord was served in accordance with regulation 12(5), the tenant may apply to the First-tier Tribunal on the grounds that the superior landlord refused consent to the making of a relevant energy efficiency improvement specified in the tenant's request other than in accordance with these Regulations.