Should the following product be disclosed on the Truth in Savings Disclosure as variable or fixed? If fixed, new TISDs with each subsequent deposit...?

IRA CD, terms from 1-5 yrs available, after initial opening deposit allows for subsequent deposits (aka contributions) which independently receives the market rate at the time of each deposit. For example, $1,000 opening deposit @ 0.45%, six months later subsequent deposit of $2,000 @ 0.65%, three months later $500 deposit @ 0.70%, etc.

Current setting is variable with a statement regarding subsequent deposits at the rate at time of deposit.

Of course there are additional questions to be addressed such as calculations considering the multiple layers, change in terms circumstances, etc. But only looking for the TISD answer for now. Thank you.