563b.310—When must I file a post-effective amendment to the offering circular?
        
        (a) 
         You must file a post-effective amendment to the offering circular with OTS when a material event or change of circumstance occurs.
    
    
        
        (b) 
         After OTS declares the post-effective amendment effective, you must immediately deliver the amendment to each person who subscribed for or ordered shares in the offering.
    
    
        
        (c) 
         Your post-effective amendment must indicate that each person may increase, decrease, or rescind their subscription or order.
    
    
        
        (d) 
         The post-effective offering period must remain open no less than 10 days nor more than 20 days, unless OTS approves a longer rescission period.