for example; IEEE copyright policy calls for
1. The undersigned hereby assigns to The Institute of Electrical and Electronics Engineers, Incorporated (the “IEEE”) all rights under copyright that may exist in and to: (a) the above Work, including any revised or expanded derivative works submitted to the IEEE by the undersigned based on the Work; and (b) any associated written or multimedia components or other enhancements accompanying the Work.
4. The undersigned hereby warrants that the Work and Presentation (collectively, the “Materials”) are original and that he/she is the author of the Materials. To the extent the Materials incorporate text passages, figures, data or other material from the works of others, the undersigned has obtained any necessary permissions. Where necessary, the undersigned has obtained all third party permissions and consents to grant the license above and has provided copies of such permissions and consents to IEEE.
in view of above is it permitted to upload pre print of paper planed or already submitted to conference/journal.