20 CFR § 216.17 - What amount of regular non-railroad employment will break a current connection.
The amount of regular non-railroad employment needed to break a current connection depends on when the applicable 30-month period ends (see § 216.13 of this part), as follows:
(2) Works and earns at least $200 in wages in any 3 months within the interval described in paragraph (a)(1) of this section.
(1) Works in any 2 consecutive years wholly or partially within the interval after the end of the 30-month period and before the month the annuity begins or the employee dies, whichever is earlier; and
(2) Earns at least $1,000 in wages in any year wholly or partially within the interval described in paragraph (b)(1) of this section (but not counting earnings during the 30-month period and after the annuity beginning date), even if that year is not one of the 2 consecutive years described in paragraph (b)(1) of this section.