You may delete the Section 1(a) basis and rely solely on the Section 44 basis, for which no specimen is required.
See 37 C.F.R. §2.35(b)(1) and TMEP §806.04 for more information on deleting a basis.
Responding Online Using the Trademark Electronic Application System (TEAS): Below are instructions for how to use TEAS to respond to such issue in an Office action. The instructions below presume that you will be using a TEAS form to respond online to more than one issue. To respond using TEAS, you must fill out the form to address all issues in the Office action and, at the end of the form, the correct party must properly sign it. For more information about who may sign a response, please review your Office action.
To respond to this issue in a nonfinal Office action, use the TEAS "Response to Office Action" (ROA) online form. To respond to this issue in a final Office action, use the TEAS "Request for Reconsideration after Final Action" form. These forms will include the appropriate required statements and supporting declaration language referenced in the Office action. The instructions provided in both forms are the same. For technical assistance with these forms, contact TEAS@uspto.gov.
TEAS online form instructions: (1) Answer "Yes" to form wizard question #2, and then, after proceeding to the next page in the form, under the heading "Classification and Listing of Goods/Services/Collective Membership Organization," do the following for each relevant class for which the basis is being amended: (2) check the box next to the following statement: "Check here to modify the current classification number; listing of goods/services/the nature of the collective membership organization; dates of use; and/or filing basis; or to submit a substitute specimen, a foreign registration certificate, or proof of renewal of a foreign registration. If not checked, the changes will be ignored."; (3) under "Filing Basis Section 1(a)," uncheck the box for "Filing Basis Section 1(a)"and delete any information appearing in the Date of First Use of Mark Anywhere and Date of First Use of Mark in Commerce text boxes.