Trial work period means the 9-month period provided under title II of the Act and as defined 20 CFR 404.1592 , during which the individual may test his or her ability to work and still receive disability cash benefits; and
Reentitlement period means a period as defined in 20 CFR 404.1592a that begins with the first month after the trial work period and ends with the 36th month after the trial work period or, if earlier, with the first month in which the impairment no longer exists or is no longer disabling. (During the reentitlement period, benefits may be discontinued because of SGA. However, if SGA is later discontinued, benefits may be reinstated without a new application and a new disability determination.)
42 C.F.R. §406.12