The Centers for Disease Control (CDC) is an Operating Division (OPDIV) of the US Department of Health and Human Services (HHS), one of the largest grantmaking agencies of the USG. If your organization focuses on health in the developing world, you're certain to run into CDC funding.
As an agency of the USG, HHS/CDC is subject to the OMB's Uniform Guidance on administering assistance awards (2 CFR 200 - see About 2 CFR 200), which it adopts via 2 CFR 300 and implements (with its own additions/clarifications) at 45 CFR 75 (eCFR link). See more at About 45 CFR 75.
HHS publishes an extensive HHS Grants Policy Statement (GPS) that supplements and amplifies 45 CFR 75.
In addition to 45 CFR 75 and HHS's GPS, CDC imposes numerous policy requirements on its recipients. See CDC's informational website for grant recipients for their fairly extensive offering.
Of particular interest on CDC's site, see the following:
CDC Grant Life Cycle Overview
Tips for Applying for CDC Grants
CDC's web page with links to forms to use for prior approval requests
Resources:
45 CFR 75 (interim final rule in FR) HHS commentary begins on 75875; 45 CFR 75 begins on 75889.
Acquisition (Procurement) rules CDC (HHS) follows:
HHS procurements are governed by the Federal Acquisition Regulation (FAR, aka Title 48 of the CFR), as supplemented by the HHS Acquisition Regulation (HHSAR).
As noted elsewhere, acquisition regulations are not the focus of this site.