The saturation of the {ital B}({ital E}2,0{sub 1}{sup +}{r arrow}2{sub 1}{sup +}) strengths in the actinide nuclei is described very well by an analytical formula using shell closures at {ital Z}=82,126 and {ital N}=126,184. The transition towards saturation is much more gradual than in the rare earth nuclei and reaches a saturation value of 325{plus minus}10 W.u. By assuming a similar correlation between {ital B}({ital E}2) and summed {ital B}({ital M}1) strengths as observed in the rare-earth region we predict for actinide nuclei a saturation of the summed {ital B}({ital M}1,0{sub 1}{sup +}{r arrow}1{sup +}) strengths below about 3 MeV of 3.7{plus minus}0.4 {mu}{sub {ital N}}{sup 2}. We compare our estimates for ({ital g}{sub {pi}}{minus}{ital g}{sub {nu}}){sup 2} with values obtained from extrapolations of averaged regional boson {ital g} factors.