Yes, 2016 version does not have the words "to this Paragraph (g)". The July 2013 52.219-28. It is a 10 year contract (base plus options) so it is long-term.
I am aware that the proposed rule from Nov. 2019 will eliminate this issue and require SBs to recertify on each new TO. SBA 2018-0006 "SBA, believes, however, that there is a legitimate concern where a concern self-certifies as small for an unrestricted MAC and at some point later in time when the concern no longer qualifies as small the contracting officer seeks to award an order as a small business set-aside and the firm uses its self-certification as a small business for the underlying unrestricted MAC. … To allow a firm's self-certification for the underlying MAC to control whether a firm is small at the time of an order years after the MAC was awarded does not make sense to SBA."
Our research indicates that for now Company A can still rely on their SB status at time of submission of the offer for the underlying MAC in 2016 unless the CO asks for a re-cert. But when SBA 2018-0006 goes final that will no longer be the case. Full section of new 121.404(a)(i)(A) posted below if you are interested.
(A) Unrestricted Multiple Award Contracts. For an unrestricted Multiple Award Contract, if a business concern is small at the time of offer and contract-level recertification for the Multiple Award Contract, it is small for goaling purposes for each order issued against the contract, unless a contracting officer requests a size recertification for a specific order or Blanket Purchase Agreement. However, except for orders and Blanket Purchase Agreements issued under any Federal Supply Schedule contract, if an order or a Blanket Purchase Agreement under an unrestricted Multiple Award Contract is set-aside exclusively for small business (i.e., small business set-aside, 8(a) small business, service-disabled veteran-owned small business, HUBZone small business, or women-owned small business), a concern must recertify its size status and qualify as a small business at the time it submits its initial offer, which includes price, for the particular order or Blanket Purchase Agreement.