Cal. Code Regs. tit. 3 § 3015.4
The University of California is responsible for the selection, propagation, trueness to variety, identification, index-testing and pest cleanliness of all plants in the foundation block.
An inventory of eligible trees in the foundation block shall be provided to the Department annually. A record of foundation stock distributed shall be provided to the Department within 60 days following distribution and shall include the names and addresses of the program participants to whom the stock was distributed.
To be eligible for foundation stock, the plant, including the rootstock if used, shall have been index-tested and found free of specific virus diseases by using the specific indicator plants listed in the following table:
| Indicator Plant | Disease |
| Elberta Peach | Peach yellows, little peach, peach rosette, rosette mosaic, phony peach mosaic, x-disease complex, yellow bud mosaic, wart, peach mottle, prunes stem pitting and astroid spot. |
| Bing Cherry | Western-x, rusty mottle, mottle leaf, rasp leaf, twisted leaf, tatter leaf, small bitter cherry, and peach mottle. |
| Kwanzan Cherry | Green ring mottle. |
| Shiro-fugen Cherry | Prunes ring-spot complex and prune dwarf virus. |
| Tilton Apricot | Ring pox. |
| Shiro Plum | Line Pattern. |
The indicator plants shall be observed for two successive growing seasons, except Shiro-fugen cherry which shall be observed for a minimum of 30 days.
Each tree in a foundation block shall be tested for the Prunes ring-spot virus complex and prune dwarf virus by approved detection methods each year.
Other procedures for virus detection approved by the Department may be used if determined to be equally suitable.
The foundation block shall be located at least 300 feet from any other plant of the same genus not entered in the program and at least one-half mile from any commercial planting of the same genus.
Trees in a foundation block shall not be registered until variety identification is confirmed.
Cal. Code Regs. Tit. 3, § 3015.4
Note: Authority cited: Sections 407 and 5823, Food and Agricultural Code. Reference: Sections 5821 and 5822, Food and Agricultural Code.