Dear Ajay,
If an employee rejoins the same organization after 15 days of resigning, then in this case New PF Number cannot be allotted to such employee. The Old PF A/c of that employee will be used to the purpose of PF Contribution submission.
Second thing, for transferring the old pf fund to new pf account, one need not to wait for 60 days period. It can be transferred any time after joining somewhere else. The interest in such cases will be accumulated till 3 years of non-active status.
Third thing, the declaration clause of non-employment is as follows:
"In the case of submission of application for settlement under clause (s) of sub-paragraph (i) and in clause (b) of sub-paragraph (2) of paragraph 69 of the EPF Scheme, 1952, the claim should be submitted after
two months from the date of leaving service provided the member continues to remain unemployed in an establishment to which the Act applies". A snap-shoot of the declaration on the Form- 19 is also attached, plz. see.
Hope, this will clear your doubt. Cheers.