Sec. 9. "Stalking" means conduct that constitutes:
(1) an offense under IC 35-45-10-5 (stalking);
(2) an offense under the laws of:
(A) the United States;
(B) another state; or
(C) an Indian tribe;
that is substantially similar to an offense described in subdivision (1); or
(3) an attempt or conspiracy to engage in conduct described in subdivision (1) or (2);
regardless of whether the conduct results in criminal prosecution or whether the person who engages in the conduct is an adult.