rehire into different plan with same employer

[Guest ohwayne]

Employee hire's in with company in 1973, works until 78 or 79, is laid off with 5 yrs recall rights. In 1984 he rehires in with same company, but at different plant, with different union. employer has same EIN# but different plan #.both plans have same break in service rule and same 10 year cliff vesting. since he never vested in first plan, will he be able to use the break in service to get his layoff time back. getting layoff time back is different in the plans.