This signature is believed to be ineligible for copyright and therefore in the public domain because it falls below the required level of originality for copyright protection both in the United States and in the source country (if different). In this case, the source country (e.g. the country of nationality of the signatory) is believed to be Philippines.
Note that this tag cannot be used on all signatures, as not all signatures are copyright-free.
This work is in the public domain in the Philippines and possibly other jurisdictions as stated by Republic Act No. 8293 because the expressed work is or is derived from a public document. Under RA 8293 (section 175), all official Philippine texts of a legislative, administrative, or judicial nature, or any official translation thereof, are ineligible for copyright.