The title of this blog post sums it up. But to say it with a few more words, if you provide covered parking, you must provide covered accessible parking.
And to say it with even MORE words:
The Standards (TAS) do not specifically state that covered accessible parking must be provided, but this interpretation is supported by section 4.1.1(1)(b) and 4.1.2(5)(a). Section 4.6.5 provides the vertical clearance requirement when covered accessible parking is provided.
4.1.1(1)(b) Appropriate Number and Location. The standards for determining the appropriate or minimum numbers contained in this document are considered minimal and the commissioner shall have the authority to make adjustments when it is determined that the standards would cause the numbers or locations to be insufficient to adequately meet the needs of people with disabilities based on the nature, use and other circumstances of any particular building or facility. In determining the appropriate number and location of a particular element, space, or fixture, the following factors shall be among those considered:
(i) population to be served;
(ii) availability to user;
(iii) location relative to distance and time;
(iv) location relative to isolation and separation;
(v) function of the building or facility; and
(vi) equal treatment and opportunity.
4.1.2(5)(a) If parking spaces are provided for self-parking by employees or visitors, or both, then accessible spaces complying with 4.6 shall be provided in each such parking area in conformance with Table 2 below (link).
Spaces required by the table need not be provided in the particular lot. They may be provided in a different location if equivalent or greater accessibility, in terms of distance from an accessible entrance, cost and convenience is ensured.
4.6.5 Vertical Clearance. Provide minimum vertical clearance of 114 in (2895 mm) at accessible passenger loading zones and along at least one vehicle access route to such areas from site entrance(s) and exit(s). At parking spaces complying with4.1.2(5)(b), provide minimum vertical clearance of 98 in (2490 mm) at the parking space and along at least one vehicle access route to such spaces from site entrance(s) and exit(s).
The requirement for covered accessible parking applies regardless of who the covered parking serves. Examples include contract parking or Doctor/Executive parking. However, it is acceptable to provide covered parking for commercial or fleet vehicles. Also, valet-only parking facilities do not require accessible parking although it is recommended.