Yes, anyone over 65 does not qualify for the exclusion according to either NEXUS or Canadian C-Spine, I don't recall off the top of my head.
That is the one time I will really push the limits though. I often contact OLMC to discuss a 'hybrid' type of SMR I enjoy using. I basically put on a collar and scoop them onto the cot. Keeping the cot flat, I use a blanket roll and tape to secure them to the frame of the cot. Then I move the straps on the cot to the criss-cross fasion, and bam...... Spinal motion restriction on a mattress!.
One way I get away with this if I call OLMC, 9 times out of 10 they will say "Why don't you just pad the board with blankets?", my standard answer is "Thin flannels don't really add padding as you can imagine, How about if I put the backboard under my cot mattress and use the 3" foam as padding"
By that time they get the point, and succumb to "Mobey's hybrid Selective Comfort Spinal Motion Restriction" (patent pending).
Edit for spelling