Analytical dependences on a static electric field <i>F</i><sub>0</sub> are derived for the wave functions, matrix elements and probabilities of radiation transitions between multiplet substates interacting in field in pairs, ranging from ordinary doublet states with spin
<i>S</i>=1/2, pair-wise interacting sublevels of triplet and quintet
states with the magnetic quantum number <i>M</i>=0, to the most general case of states with arbitrary angular <i>L</i> and spin <i>S</i> momenta and maximal magnitude of the magnetic quantum number |<i>M</i>|=<i>L</i>+<i>S</i>-1. Equalization of doublet line intensities in the anticrossing field region and vanishing of one of the two doublet lines in the high-field regime are demonstrated. A general relation is
determined between the anticrossing field <i>F</i><sub>A</sub>, multiplet splitting and tensor polarizability.