Applications for relief shall be submitted by needy and poor persons to the Director at the Marion County Courthouse during usual business hours, upon forms provided by the Director. If, because of undue hardship, a needy or poor person cannot come to the Courthouse, the Director shall mail such person the application form or deliver to such person the application. Applications are good for one year from completion date, but will be updated upon each request for assistance. The application shall be signed by the applicant under penalty of perjury. If the applicant or the family unit is or appears to be eligible for relief or assistance from any other Federal, State or local source, the Director shall immediately refer the applicant to that source. It shall be the obligation of the applicant to immediately make application to that source and to pursue such application with due diligence as a condition to be eligible for further relief under this chapter. It is the obligation of each person applying to establish his or her eligibility for any category of relief and need for any item of relief. The director shall also receive anything that the person applying desires to submit to establish his or her eligibility or need, to include statements or letters, medical reports and other written documents as well as the verbal statements of the applicant. The Director shall then proceed to conduct an investigation concerning the applicant’s eligibility and needs. The applicant’s file and the investigation and findings of the Director shall be made available to the applicant, upon request, or to the applicant’s attorney by written authorization.