An appeal "by leave" or "permission" requires the appellant to obtain leave to appeal; in such a situation either or both of the lower court and the court may have the discretion to grant or refuse the appellant's demand to appeal the lower court's decision.
ɐn ɐpˈiːl "baɪ lˈiːv" ɔːɹ "pɚmˈɪʃən" ɹᵻkwˈaɪɚz ðɪ ɐpˈɛlənt tʊ əbtˈeɪn lˈiːv tʊ ɐpˈiːl; ɪn sˈʌtʃ ɐ sˌɪtʃuːˈeɪʃən ˈiːðɚ ɔːɹ bˈoʊθ ʌvðə lˈoʊɚ kˈoːɹt ænd ðə kˈoːɹt mˌeɪhɐv ðə dɪskɹˈɛʃən tə ɡɹˈænt ɔːɹ ɹᵻfjˈuːz ðɪ ɐpˈɛlənts dᵻmˈænd tʊ ɐpˈiːl ðə lˈoʊɚ kˈoːɹts dᵻsˈɪʒən.