Can I use Oobr 's recline feature without using the lower LATCH (UAS) anchors?

NEVER use the Oobr's recline feature without the booster seat's lower LATCH (UAS) connectors securely attached to the vehicle's lower anchors. When using the booster seat without using the LATCH (UAS) connectors, the back of the booster seat base MUST be in contact with the vehicle seat back.