; and (II) to maximize 21CSC project completion in a cost-effective manner by collaborating to leverage existing resources described in section 210(b). (ii) Approval and data collection The head of each participating entity shall, to the maximum extent practicable, coordinate with each other head of a participating entity— (I) to approve organizations as 21CSC organizations; and (II) to collect the data referred to in items (aa) through (dd) of subparagraph (C)(i)(I). (iii) Guidance The head of each participating entity shall, to the maximum extent practicable, seek guidance from— (I) the Corporation for National and Community Service; (II) the Departments of Veterans Affairs and Labor on methods to increase the participation of veterans in 21CSC projects; and (III) the Secretary of the Interior, acting through the Assistant Secretary for Indian Affairs, on methods to increase the participation of Indians in 21CSC projects. (C) Reporting (i) 21CSC Reports (I) Report to Congress As soon as practicable after the date of enactment of the 21st Century Conservation Service Corps Act of 2017 , the Chief Executive Officer of the Corporation for National and Community Service, in coordination with the head of each participating entity, shall submit to Congress a report that includes data, for the year covered by the report, including— (aa) the number of Corpsmembers that carried out 21CSC projects and the length of the term of service for each Corpsmember; (bb) the total amount of funding provided by participating entities for the service of Corpsmembers; (cc) the type of service performed by Corpsmembers and the impact and accomplishments of the service; and (dd) any other similar data determined by the Chief Executive Officer of the Corporation for National and Community Service or the head of a participating entity to be appropriate, including data sufficient to determine the effectiveness of 21CSC organizations in carrying out activities to achieve the purposes of this title in a manner that— (AA) is cost-effective