A domestic insurance company may invest in those assets, which are currently reported in Schedule BA of its annual statement; provided, that those investments do not exceed in the aggregate ten percent (10%) of the company’s admitted assets. Those investments may include, but are not limited to, the following types of investments:

(1)  All loans on or investments in oil and gas production payments;

(2)  All transportation equipment;

(3)  Timber deeds;

(4)  Mineral rights carried as admitted assets;

(5)  Motor vehicle trust certificates; and

(6)  Any other class of admitted investment not clearly includible in other statement schedules.