the next highest and next lowest maturities.
If the Treasury Constant Maturity Series becomes unavailable, we will adopt a comparable constant maturity index. If such a comparable index is not available, we will replicate calculation of the Treasury Constant Maturity Series Index based on U.S. Treasury Security coupon rates.
End of a Guarantee Period
We will notify you in writing at least 30 days prior to the end of each of your Guarantee Periods. At the end of your Guarantee Period, we will automatically transfer your Guarantee Period's Fixed Account Value to the Columbia Money Market Sub-account unless we have received:
your election of a new Guarantee Period from among those we offer at that time; or
your instructions to transfer the ending Fixed Account Value to one or more Sub-accounts of the Variable Account.
You may not elect a new Guarantee Period that is longer than the number of years remaining until the Income Date.
Transfers of Fixed Account Value
You may transfer Fixed Account Value from one of your Guarantee Periods to another or to one or more Sub- accounts of the Variable Account subject to any applicable market value adjustment. If the Fixed Account Value represents multiple Guarantee Periods, your transfer request must specify from which values you want the transfer made.
The Certificate allows us to limit the number of transfers you may make in a specified time period. Currently, we generally limit Variable Account and Fixed Account transfers to one transfer every 30 days with a $2,000,000 per transfer dollar limit. See "Transfer of Variable Account Value" and "Limits on Transfers". These limitations will not apply to any transfer made at the end of a Guarantee Period. We will notify you prior to changing the current limitations.
You must request transfers in writing unless you have authorized us in writing to accept telephone transfer instructions from you or from a person acting on your behalf as an attorney-in-fact under a power of attorney. By authorizing us to accept telephone transfer instructions, you agree to the conditions and procedures we establish from time to time. The current conditions and procedures are in Appendix B. If you have authorized telephone transfers, you will be notified in advance of any changes. A person acting on your behalf as an attorney-in-fact under a power of attorney may request transfers in writing.
If we receive your transfer requests before 4:00 PM Eastern Time, or any other time for the close of trading on the New York Stock Exchange, we will execute them at the close of business that day. Any written requests we receive later, we will execute at the close of the next business day.
If you transfer 100% of a Guarantee Period's value and your current allocation for purchase payments includes that Guarantee Period, we will automatically change the allocation formula for future purchase payments unless you instruct otherwise. For example, if the allocation formula is 50% to the One-Year Guarantee Period and 50% to Sub- account A and you transfer all Fixed Account Value to Sub-account A, we will change the allocation formula to 100% to Sub-account A.