The external and internal oblique muscles rotate and side bend the trunk. These muscles also contribute to spinal stability. The external oblique is the most superficial muscle of the three flat abdominal muscles (the external oblique, internal oblique, and transversus abdominis).he external oblique is the most superficial muscle of the three flat abdominal muscles (the external oblique, internal oblique, and transversus abdominis).
IRS Publication 1771, Charitable ContributionsâSubstantiation and Disclosure. Requirements, explains the federal tax law for organizations, such as charities and. churches, that receive tax-deductible charitable contributions and for taxpayers who make. contributions. The IRS imposes recordkeeping and substantiation rules on donors of charitable.
Â§1.274-5T(h)(2) Substantiation Requirements Publication 463 provides information regarding records, substantiation and reporting requirements for independent contractors, such as vendors. Independent contractors are treated in the same manner as are employees for purposes of working condition fringe benefits.