; or (B) the implementation of the management plan for the Recreation Area prepared under section 10(a). (2) Matching funds (A) In general The Secretary shall require that any Federal funds made available under an agreement entered into under paragraph (1) shall be matched on a 1-to-1 basis by non-Federal funds. (B) In-kind contribution With the approval of the Secretary, the non-Federal share required under subparagraph (A) may be in the form of property, goods, or services from a non-Federal source, fairly valued. (3) Effect Nothing in this subsection affects any existing cooperative agreement authority applicable to Chesapeake Gateways. (b) Partner site agreements (1) In general The Secretary, under such terms and conditions as the Secretary considers to be appropriate, may enter into a partner site agreement with an eligible entity described in paragraph (2) that owns or manages an eligible site described in paragraph (3), which shall provide for the inclusion of the partner site in the Recreation Area. (2) Description of eligible entity An eligible entity referred to in paragraph (1) is— (A) a Federal entity; (B) a State or local government; (C) a Tribal government; (D) a private nonprofit organization; or (E) a private landowner. (3) Description of eligible site An eligible site referred to in paragraph (1) is land that the Secretary has determined— (A) contains a nationally significant natural, recreational, historical, or cultural resource; (B) ensures public access to the applicable resource