"Grant recipients are required to credit IMLS in all related publications and activities in conjunction with use of the grant funds. Recipients should publicize grant-supported activities in available and appropriate media. Logo images are available on the ARPA webpage. All publications must include an acknowledgement statement which is provided with the images on the website."
More information and links:
https://kslib.info/1467/ARPA-Grant > Files & Documents Tab
You should include the logo if possible on all media about your grant project. If there is no room for the logo you may use the credit line "This project was made possible in part by the Institute of Museum and Library Services."
Find more information on IMLS acknowledgement:
https://www.imls.gov/grants/manage-your-award/grantee-communications-kit/imls-acknowledgement-requirements