A 457(f) plan allows tax-exempt employers to provide supplemental retirement benefits to key executives and highly compensated employees. Contributions to a 457(f) plan are unlimited and are made solely by the employer. Plan assets are owned by the employer and subject to creditors' claims. Benefits vest when the substantial risk of forfeiture lapses, which is defined in the plan documents. Distributions can occur due to events like disability, death, separation from service, or the lapsing of the substantial risk of forfeiture. 457(f) plans are not subject to many of the rules that apply to other retirement plans, such as nondiscrimination testing, minimum coverage requirements