The Summary Plan Description (SPD) should include your plan's claims procedures. Usually, you fill out the required paperwork and submit it to the plan.Helping you map a retirement plan that dynamically adjusts investing strategies based on the different stages of your life. Documents and make available such information as may be required in the administration of the Plan. Pension plans and how they work with ERISA can be confusing. To update investment elections for your current balance or future contributions, log in to your account at principal. Com or call us at 800.547. 7754. Transfers to Purchase Service Credit (refer to Information pages for additional information): Indicate Retirement Date (if known). However, sources say the agency is more responsive to plan sponsors looking for plan direction. Although there is no list of approved investments for retirement plans, there are special rules contained in ERISA that apply to retirement plan investments.