For purposes of this chapter:

1. (a) “Land” means any right or interest, including development rights, in real property which is essentially unimproved and devoted to an open-space use as defined in Section 65560 or real property which is of significant historic or cultural value.
2. (b) “Person” means a transferee of property subject to tax under the Inheritance Tax Law (Part 8 (commencing with Section 13301) of Division 2 of the Revenue and Taxation Code), which includes open-space land, where the total property transferred to such transferee does not include sufficient money or other liquid assets to pay the state inheritance tax on the transfer.
3. (c) “Secretary” means the Secretary of the Resources Agency.